From 4b2fd720a7b2f78c42d1565edf4c67f378c65440 Mon Sep 17 00:00:00 2001 From: Toshifumi NISHINAGA Date: Fri, 8 Jul 2016 01:02:26 +0900 Subject: stm32: Change USART port to USART6 for stm32f746 discovery board This change is to remove a halt at about 200KiB while sending a large(1MiB) binary to a micro controller using USART1. USART1 is connected to a PC via an on-board ST-Link debugger that also functions as a USB-Serial converter. However, it seems to loss some data occasionally. So I changed the serial port to USART6 and connected it to the PC using an FTDI USB-Serial cable, therefore the transmission was successfully completed. Signed-off-by: Toshifumi NISHINAGA --- arch/arm/include/asm/arch-stm32f7/stm32_periph.h | 2 ++ arch/arm/mach-stm32/stm32f7/clock.c | 3 +++ 2 files changed, 5 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/include/asm/arch-stm32f7/stm32_periph.h b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h index 38adc4e..0bd4695 100644 --- a/arch/arm/include/asm/arch-stm32f7/stm32_periph.h +++ b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h @@ -17,11 +17,13 @@ enum periph_id { UART1_GPIOA_9_10 = 0, UART2_GPIOD_5_6, + UART6_GPIOC_6_7, }; enum periph_clock { USART1_CLOCK_CFG = 0, USART2_CLOCK_CFG, + USART6_CLOCK_CFG, GPIO_A_CLOCK_CFG, GPIO_B_CLOCK_CFG, GPIO_C_CLOCK_CFG, diff --git a/arch/arm/mach-stm32/stm32f7/clock.c b/arch/arm/mach-stm32/stm32f7/clock.c index 78d22d4..ac47850 100644 --- a/arch/arm/mach-stm32/stm32f7/clock.c +++ b/arch/arm/mach-stm32/stm32f7/clock.c @@ -245,6 +245,9 @@ void clock_setup(int peripheral) case USART1_CLOCK_CFG: setbits_le32(RCC_BASE + RCC_APB2ENR, RCC_ENR_USART1EN); break; + case USART6_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_APB2ENR, RCC_ENR_USART6EN); + break; case GPIO_A_CLOCK_CFG: setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_A_EN); break; -- cgit v1.1