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Merge branch 'feature/emmc_doc_ut_4bit_sdr' into 'master'

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sdmmc_host: add unit tests and improve documents about using eMMC in 4-line SDR mode

See merge request espressif/esp-idf!13334
This commit is contained in:
Michael (XIAO Xufeng) 2021-05-02 13:58:13 +00:00
commit 1f95403596
2 changed files with 9 additions and 3 deletions
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8
components/sdmmc/test/test_sd.c
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@ -133,13 +133,19 @@ TEST_CASE("probe SD, slot 1, 1-bit", "[sd][test_env=UT_T1_SDMODE]")
}
#ifdef WITH_EMMC_TEST
TEST_CASE("probe eMMC, slot 0, 4-bit, DDR", "[sd][test_env=EMMC]")
TEST_CASE("probe eMMC, slot 0, 4-bit", "[sd][test_env=EMMC]")
{
//Test with SDR
probe_sd(SDMMC_HOST_SLOT_0, 4, SDMMC_FREQ_PROBING, 0);
probe_sd(SDMMC_HOST_SLOT_0, 4, SDMMC_FREQ_DEFAULT, 0);
probe_sd(SDMMC_HOST_SLOT_0, 4, SDMMC_FREQ_HIGHSPEED, 0);
//Test with DDR
probe_sd(SDMMC_HOST_SLOT_0, 4, SDMMC_FREQ_HIGHSPEED, 1);
}
TEST_CASE("probe eMMC, slot 0, 8-bit", "[sd][test_env=EMMC]")
{
//8-bit DDR not supported yet, test with SDR only
probe_sd(SDMMC_HOST_SLOT_0, 8, SDMMC_FREQ_PROBING, 0);
probe_sd(SDMMC_HOST_SLOT_0, 8, SDMMC_FREQ_DEFAULT, 0);
probe_sd(SDMMC_HOST_SLOT_0, 8, SDMMC_FREQ_HIGHSPEED, 0);

4
docs/en/api-reference/peripherals/sdmmc_host.rst
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@ -51,8 +51,8 @@ Supported Speed Modes
SDMMC Host driver supports the following speed modes:
- Default Speed (20 MHz), 4-line/1-line (with SD cards), and 8-line (with 3.3 V eMMC)
- High Speed (40 MHz), 4-line/1-line (with SD cards), and 8-line (with 3.3 V eMMC)
- Default Speed (20 MHz), 1/4-line (with SD cards), and 1/4/8-line (with 3.3 V eMMC)
- High Speed (40 MHz), 1/4-line (with SD cards), and 1/4/8-line (with 3.3 V eMMC)
- High Speed DDR (40 MHz), 4-line (with 3.3 V eMMC)
Speed modes not supported at present: