diff options
| author | Toshifumi NISHINAGA <tnishinaga.dev@gmail.com> | 2016-07-08 01:02:26 +0900 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-07-14 18:22:44 -0400 |
| commit | 4b2fd720a7b2f78c42d1565edf4c67f378c65440 (patch) | |
| tree | 97c496a53008f138475a3991ac4c0ed3920ce26e | |
| parent | 25c1b1353ce4b8188de6058f9f3b0d5d2dad8230 (diff) | |
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 <tnishinaga.dev@gmail.com>
| -rw-r--r-- | arch/arm/include/asm/arch-stm32f7/stm32_periph.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-stm32/stm32f7/clock.c | 3 | ||||
| -rw-r--r-- | board/st/stm32f746-disco/stm32f746-disco.c | 13 |
3 files changed, 11 insertions, 7 deletions
diff --git a/arch/arm/include/asm/arch-stm32f7/stm32_periph.h b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h index 38adc4e0e2..0bd4695727 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 78d22d40fd..ac47850551 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; diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c index 404fdfa2a7..47aa05897e 100644 --- a/board/st/stm32f746-disco/stm32f746-disco.c +++ b/board/st/stm32f746-disco/stm32f746-disco.c @@ -32,7 +32,7 @@ const struct stm32_gpio_ctl gpio_ctl_usart = { .otype = STM32_GPIO_OTYPE_PP, .speed = STM32_GPIO_SPEED_50M, .pupd = STM32_GPIO_PUPD_UP, - .af = STM32_GPIO_AF7 + .af = STM32_GPIO_AF8 }; const struct stm32_gpio_ctl gpio_ctl_fmc = { @@ -251,8 +251,8 @@ int dram_init(void) } static const struct stm32_gpio_dsc usart_gpio[] = { - {STM32_GPIO_PORT_A, STM32_GPIO_PIN_9}, /* TX */ - {STM32_GPIO_PORT_B, STM32_GPIO_PIN_7}, /* RX */ + {STM32_GPIO_PORT_C, STM32_GPIO_PIN_6}, /* TX */ + {STM32_GPIO_PORT_C, STM32_GPIO_PIN_7}, /* RX */ }; int uart_setup_gpio(void) @@ -260,8 +260,7 @@ int uart_setup_gpio(void) int i; int rv = 0; - clock_setup(GPIO_A_CLOCK_CFG); - clock_setup(GPIO_B_CLOCK_CFG); + clock_setup(GPIO_C_CLOCK_CFG); for (i = 0; i < ARRAY_SIZE(usart_gpio); i++) { rv = stm32_gpio_config(&usart_gpio[i], &gpio_ctl_usart); if (rv) @@ -273,7 +272,7 @@ out: } static const struct stm32x7_serial_platdata serial_platdata = { - .base = (struct stm32_usart *)USART1_BASE, + .base = (struct stm32_usart *)USART6_BASE, .clock = CONFIG_SYS_CLK_FREQ, }; @@ -292,7 +291,7 @@ int board_early_init_f(void) int res; res = uart_setup_gpio(); - clock_setup(USART1_CLOCK_CFG); + clock_setup(USART6_CLOCK_CFG); if (res) return res; |