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sdmmc host: minor cleanup

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Ivan Grokhotkov
2018-06-22 20:11:30 +08:00
parent b01e87bbaf
commit 80e47a005d
1 changed files with 10 additions and 7 deletions
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9
components/driver/sdmmc_host.c
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@@ -336,7 +336,8 @@ esp_err_t sdmmc_host_init_slot(int slot, const sdmmc_slot_config_t* slot_config)
if (slot_width >= 4) { if (slot_width >= 4) {
configure_pin(pslot->d1_gpio); configure_pin(pslot->d1_gpio);
configure_pin(pslot->d2_gpio); configure_pin(pslot->d2_gpio);
//force pull-up D3 to make slave detect SD mode. connect to peripheral after width configuration. // Force D3 high to make slave enter SD mode.
// Connect to peripheral after width configuration.
gpio_config_t gpio_conf = { gpio_config_t gpio_conf = {
.pin_bit_mask = BIT(pslot->d3_gpio), .pin_bit_mask = BIT(pslot->d3_gpio),
.mode = GPIO_MODE_OUTPUT , .mode = GPIO_MODE_OUTPUT ,
@@ -445,10 +446,12 @@ esp_err_t sdmmc_host_set_bus_width(int slot, size_t width)
} else if (width == 4) { } else if (width == 4) {
SDMMC.ctype.card_width_8 &= ~mask; SDMMC.ctype.card_width_8 &= ~mask;
SDMMC.ctype.card_width |= mask; SDMMC.ctype.card_width |= mask;
configure_pin(sdmmc_slot_info[slot].d3_gpio); // D3 was set to GPIO high to force slave into SD 1-bit mode, until 4-bit mode is set // D3 was set to GPIO high to force slave into SD mode, until 4-bit mode is set
configure_pin(sdmmc_slot_info[slot].d3_gpio);
} else if (width == 8) { } else if (width == 8) {
SDMMC.ctype.card_width_8 |= mask; SDMMC.ctype.card_width_8 |= mask;
configure_pin(sdmmc_slot_info[slot].d3_gpio); // D3 was set to GPIO high to force slave into SD 1-bit mode, until 4-bit mode is set // D3 was set to GPIO high to force slave into SD mode, until 4-bit mode is set
configure_pin(sdmmc_slot_info[slot].d3_gpio);
} else { } else {
return ESP_ERR_INVALID_ARG; return ESP_ERR_INVALID_ARG;
} }