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< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "spi_nand_baremetal_design_intro_luban_lite__table_u3w_dzh_bdc__entry__2" > < span class = "+ topic/ph sw-d/filepath ph filepath" > bsp/examples_bare/mtd.c< / span > < p class = "- topic/p p" data-ofbid = "d59080e73__20250409171035" > 用户可以参考此文件进行测试开发。< / p > < / td >
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< div class = "- topic/div div" >
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< div class = "- topic/div div" > < span class = "+ topic/ph sw-d/filepath ph filepath" > bsp/artinchip/drv_bare/spinand/spinand_mtd.c< / span > < / div >
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< / p > < / td >
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< td class = "- topic/entry entry colsep-1 rowsep-0" headers = "spi_nand_baremetal_design_intro_luban_lite__table_u3w_dzh_bdc__entry__1" > < p class = "- topic/p p" data-ofbid = "d59080e130__20250409171035" > 其它重要文件 < / p > < / td >
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< section class = "- topic/section section" id = "spi_nand_baremetal_design_intro_luban_lite__section_gg4_tdh_f1c" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__section_gg4_tdh_f1c" > < h2 class = "- topic/title title sectiontitle" > Baremetal 层次关系< / h2 >
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< div class = "- topic/p p" data-ofbid = "d59080e148__20250409171035" > < a class = "- topic/xref xref" href = "#spi_nand_baremetal_design_intro_luban_lite__fig_mvp_1dh_f1c" > Baremetal 层次关系< / a > 如下所示：< figure class = "- topic/fig fig fignone" id = "spi_nand_baremetal_design_intro_luban_lite__fig_mvp_1dh_f1c" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__fig_mvp_1dh_f1c" >
< br / > < div class = "imagecenter" > < img class = "- topic/image image imagecenter" id = "spi_nand_baremetal_design_intro_luban_lite__image_xzk_vch_f1c" src = "../../../images/spinand/bar_spinand.png" alt = "bar_spinand" / > < / div > < br / >
< figcaption data-caption-side = "bottom" class = "- topic/title title figcapcenter" > < span class = "figtitleprefix fig--title-label" > 图< span class = "fig--title-label-number" > 1< / span > < span class = "fig--title-label-punctuation" > . < / span > < / span > < span class = "fig--title" > Baremetal 层次关系< / span > < / figcaption > < / figure > < / div >
< p class = "- topic/p p" data-ofbid = "d59080e165__20250409171035" > 用户开发项目，在 MTD 层上开发, SPINAND 层上开发可能会破坏 spl、os 分区的数据。< / p >
< / section >
< section class = "- topic/section section" id = "spi_nand_baremetal_design_intro_luban_lite__section_u3n_5dh_f1c" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__section_u3n_5dh_f1c" > < h2 class = "- topic/title title sectiontitle" > Baremetal 关键流程< / h2 >
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< ul class = "- topic/ul ul" id = "spi_nand_baremetal_design_intro_luban_lite__ul_z5m_3dh_f1c" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__ul_z5m_3dh_f1c" >
< li class = "- topic/li li" data-ofbid = "d59080e176__20250409171035" > SPI NAND
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初始化流程< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "spi_nand_baremetal_design_intro_luban_lite__codeblock_flm_kdh_f1c" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__codeblock_flm_kdh_f1c" > mtd_probe < em class = "hl-comment" > //bsp/artinchip/drv_bare/mtd/mtd_probe.c< / em >
|-> spinand_probe(AIC_BOOTLOADER_SPINAND_QSPI_ID); < em class = "hl-comment" > //bsp/artinchip/drv_bare/spinand/spinand_mtd.c< / em >
|-> get_qspi_by_index(spi_bus); < em class = "hl-comment" > // 获取 bus 对象< / em >
|-> qspi_configure(qspi, NULL); < em class = "hl-comment" > //bsp/artinchip/drv_bare/spinand/spinand_port.c< / em >
|-> hal_qspi_master_init(& qspi-> handle, & cfg);
|-> hal_qspi_master_dma_config(& qspi-> handle, & dmacfg);
|-> hal_qspi_master_set_bus_freq(& qspi-> handle, qspi-> bus_hz);
|-> spinand_flash_init(flash); < em class = "hl-comment" > //bsp/peripheral/spinand/spinand.c< / em >
|-> spinand_info_read(flash);
|-> nand_bbt_init(flash);
|-> part = mtd_parts_parse(NOR_MTD_PARTS); < em class = "hl-comment" > //解析分区信息< / em >
|-> mtd-> ops.erase = sfud_mtd_erase;
|-> mtd-> ops.erase = mtd_spinand_erase;
|-> mtd-> ops.block_isbad = mtd_spinand_block_isbad;
|-> mtd-> ops.block_markbad = mtd_spinand_block_markbad;
|-> mtd-> ops.read = mtd_spinand_read;
|-> mtd-> ops.write = mtd_spinand_write;
|-> mtd-> ops.read_oob = mtd_spinand_read_oob;
|-> mtd-> ops.write_oob = mtd_spinand_write_oob;
|-> mtd-> ops.cont_read = mtd_spinand_continuous_read;
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|-> mtd_add_device(mtd); < em class = "hl-comment" > //添加 mtd 分区< / em > < / pre > < / li >
< li class = "- topic/li li" data-ofbid = "d59080e181__20250409171035" > SPI NAND
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读数据流程< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "spi_nand_baremetal_design_intro_luban_lite__codeblock_nmp_kdh_f1c" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__codeblock_nmp_kdh_f1c" > mtd_read < em class = "hl-comment" > //bsp/artinchip/drv_bare/mtd/mtdcore.c< / em >
|-> mtd_spinand_read(< strong class = "hl-keyword" > struct< / strong > mtd_dev *mtd, u32 offset, u8 *data, u32 len); < em class = "hl-comment" > //bsp/artinchip/drv_bare/spinand/spinand_mtd.c< / em >
|-> spinand_read(flash, data, start, dolen); < em class = "hl-comment" > //bsp/peripheral/spinand/spinand.c< / em >
|-> spinand_block_isbad(flash, blk);
|-> spinand_read_page(flash, page, p, flash-> info-> page_size, NULL, < span class = "hl-number" > 0< / span > );
|-> spinand_load_page_op(flash, page);
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|-> spinand_read_from_cache_op(flash, column, buf, nbytes);< / pre > < / li >
< / ul >
< / section >
< section class = "- topic/section section" id = "spi_nand_baremetal_design_intro_luban_lite__id6" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__id6" > < h2 class = "- topic/title title sectiontitle" > Baremetal 应用接口设计< / h2 >
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< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_njw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_njw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 2< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_probe< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e210__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e214__20250409171035" > int mtd_probe(void);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e221__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e225__20250409171035" > 初始化所有 mtd 设备< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e232__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e236__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 0: 成功< / div >
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< div class = "- topic/div div" > 其它: 失败< / div >
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< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e252__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e256__20250409171035" > 只有初始化 mtd 设备之后, 才能正常使用其它函数< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_ojw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_ojw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 3< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_add_device< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e280__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e284__20250409171035" > int mtd_add_device(struct mtd_dev *mtd);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e291__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e295__20250409171035" > 增加 mtd 设备< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e302__20250409171035" > 参数定义 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e306__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > struct mtd_dev *mtd< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 设备对象< / div >
< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e325__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e329__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 0: 成功< / div >
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< div class = "- topic/div div" > 其它: 失败< / div >
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< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e345__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e349__20250409171035" > -< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_pjw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_pjw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 4< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_get_device_count< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e373__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e377__20250409171035" > u32 mtd_get_device_count(void);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e384__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e388__20250409171035" > 获取注册的 mtd 设备个数< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e395__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e399__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 注册的 mtd 设备个数< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e412__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e416__20250409171035" > -< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_qjw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_qjw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 5< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_get_device_by_id< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e440__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e444__20250409171035" > struct mtd_dev *mtd_get_device_by_id(u32 id);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e451__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e455__20250409171035" > 通过索引号获取 mtd 设备句柄< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e462__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e466__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 设备句柄< / div >
< div class = "- topic/div div" > 为空：失败< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e482__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e486__20250409171035" > -< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_rjw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_rjw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 6< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_get_device< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e511__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e515__20250409171035" > struct mtd_dev *mtd_get_device(const char *name);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e522__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e526__20250409171035" > 通过分区名获取 mtd 设备句柄< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e533__20250409171035" > 参数定义 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e537__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > char *name< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 分区名< / div >
< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e556__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e560__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 设备句柄< / div >
< div class = "- topic/div div" > 为空：失败< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e576__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e580__20250409171035" > -< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_sjw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_sjw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 7< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_read< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e604__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e608__20250409171035" > int mtd_read(struct mtd_dev *mtd, u32 offset, u8 *data, u32
len);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e615__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e619__20250409171035" > 读取 mtd 分区数据到缓冲区上< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e626__20250409171035" > 参数定义 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e630__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > struct mtd_dev *mtd< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 分区设备句柄< / div >
< / div >
< div class = "- topic/div div" > u32 offset< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 偏移值< / div >
< / div >
< div class = "- topic/div div" > u8 *data< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 接收数据缓冲区< / div >
< / div >
< div class = "- topic/div div" > u32 len< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 接收数据长度< / div >
< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e677__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e681__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 0: 成功< / div >
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< div class = "- topic/div div" > 其它: 失败< / div >
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< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e697__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e701__20250409171035" > offset 与 page 对齐，在读取数据的过程中，如果遇到了坏块，会自动寻找下一个好块，继续读取数据< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_tjw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_tjw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 8< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_erase< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e725__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e729__20250409171035" > int mtd_erase(struct mtd_dev *mtd, u32 offset, u32 len);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e736__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e740__20250409171035" > 擦除 mtd 分区某块区域的数据< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e747__20250409171035" > 参数定义 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e751__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > struct mtd_dev *mtd< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 分区设备句柄< / div >
< / div >
< div class = "- topic/div div" > u32 offset< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 偏移值< / div >
< / div >
< div class = "- topic/div div" > u32 len< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 擦除数据长度< / div >
< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e789__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e793__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 0: 成功< / div >
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< div class = "- topic/div div" > 其它: 失败< / div >
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< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e809__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e813__20250409171035" > offset 必须与 block 对齐< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_ujw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_ujw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 9< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_write< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e837__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e841__20250409171035" > int mtd_write(struct mtd_dev *mtd, u32 offset, u8 *data, u32
len);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e848__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e852__20250409171035" > 写入缓冲区上的数据到 mtd 分区上< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e859__20250409171035" > 参数定义 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e863__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > struct mtd_dev *mtd< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 分区设备句柄< / div >
< / div >
< div class = "- topic/div div" > u32 offset< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 偏移值< / div >
< / div >
< div class = "- topic/div div" > u8 *data< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 发送缓冲区地址< / div >
< / div >
< div class = "- topic/div div" > u32 len< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 擦除数据的长度< / div >
< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e910__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e914__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 0: 成功< / div >
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< div class = "- topic/div div" > 其它: 失败< / div >
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< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e930__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e934__20250409171035" > offset 与 page 对齐，在写入数据的过程中，如果遇到了坏块，会自动寻找下一个好块，继续写入数据< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_vjw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_vjw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 10< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_block_isbad< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e958__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e962__20250409171035" > int mtd_block_isbad(struct mtd_dev *mtd, u32 offset);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e969__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e973__20250409171035" > 判断指定的块是否是坏块< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e980__20250409171035" > 参数定义 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e984__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > struct mtd_dev *mtd< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 分区设备句柄< / div >
< / div >
< div class = "- topic/div div" > u32 offset< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 偏移值< / div >
< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1012__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1016__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 1: 坏块< / div >
< div class = "- topic/div div" > 0: 正常块< / div >
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< div class = "- topic/div div" > 其它: 失败< / div >
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< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e1035__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e1039__20250409171035" > offset 必须与 block 大小对齐< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_wjw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_wjw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 11< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_block_markbad< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1063__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1067__20250409171035" > int mtd_block_markbad(struct mtd_dev *mtd, u32 offset);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1074__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1078__20250409171035" > 标记指定的块为坏块< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1085__20250409171035" > 参数定义 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1089__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > struct mtd_dev *mtd< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 分区设备句柄< / div >
< / div >
< div class = "- topic/div div" > u32 offset< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 偏移值< / div >
< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1117__20250409171035" > 返回值 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1121__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 0: 成功< / div >
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< div class = "- topic/div div" > 其它: 失败< / div >
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< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e1137__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e1141__20250409171035" > offset 必须与 block 大小对齐< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table colwidths-given docutils align-default frame-all" id = "spi_nand_baremetal_design_intro_luban_lite__table_xjw_dzh_bdc" data-ofbid = "spi_nand_baremetal_design_intro_luban_lite__table_xjw_dzh_bdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 12< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > < strong class = "+ topic/ph hi-d/b ph b" > mtd_contread< / strong > < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1166__20250409171035" > 函数原型 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1170__20250409171035" > int mtd_contread(struct mtd_dev *mtd, u32 offset, uint8_t *data,
u32 len);< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1177__20250409171035" > 功能说明 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1181__20250409171035" > 使用连续读取模式读取 mtd 分区数据到缓冲区上< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1188__20250409171035" > 参数定义 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1192__20250409171035" >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > struct mtd_dev *mtd< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > mtd 分区设备句柄< / div >
< / div >
< div class = "- topic/div div" > u32 offset< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 偏移值< / div >
< / div >
< div class = "- topic/div div" > u8 *data< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 接收数据缓冲区< / div >
< / div >
< div class = "- topic/div div" > u32 len< / div >
< div class = "- topic/div div" >
< div class = "- topic/div div" > 接收数据长度< / div >
< / div >
< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-1" > < p class = "- topic/p p" data-ofbid = "d59080e1239__20250409171035" > 返回值 < / p > < / td >
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< div class = "- topic/div div" >
< div class = "- topic/div div" > 0: 成功< / div >
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< div class = "- topic/div div" > 其它: 失败< / div >
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< / div >
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< / p > < / td >
< / tr >
< tr class = "- topic/row" >
< td class = "- topic/entry entry colsep-1 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e1259__20250409171035" > 注意事项 < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" > < p class = "- topic/p p" data-ofbid = "d59080e1263__20250409171035" > 芯片必须支持连续读取模式, offset 大小与 page 对齐< / p > < / td >
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