From 72ca049de732dc6d8e30385517d835fa7d56e5e0 Mon Sep 17 00:00:00 2001 From: Damien George Date: Thu, 1 Feb 2018 15:17:18 +1100 Subject: [PATCH] stm32/sdcard: Use maximum speed SDMMC clock on F7 MCUs. This will get the SDMMC clock up to 48MHz. --- ports/stm32/sdcard.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/ports/stm32/sdcard.c b/ports/stm32/sdcard.c index b8a73daaf6..9b087ef849 100644 --- a/ports/stm32/sdcard.c +++ b/ports/stm32/sdcard.c @@ -198,6 +198,10 @@ bool sdcard_power_on(void) { } // configure the SD bus width for wide operation + #if defined(MCU_SERIES_F7) + // use maximum SDMMC clock speed on F7 MCUs + sd_handle.Init.ClockBypass = SDMMC_CLOCK_BYPASS_ENABLE; + #endif if (HAL_SD_ConfigWideBusOperation(&sd_handle, SDIO_BUS_WIDE_4B) != HAL_OK) { HAL_SD_DeInit(&sd_handle); goto error;