From: Toshifumi NISHINAGA <tnishinaga....@gmail.com>
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....@gmail.com>
---
arch/arm/include/asm/arch-stm32f7/stm32_periph.h | 2 ++
arch/arm/mach-stm32/stm32f7/clock.c | 3 +++
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 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;
diff --git a/board/st/stm32f746-disco/stm32f746-disco.c
b/board/st/stm32f746-disco/stm32f746-disco.c
index 404fdfa..47aa058 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;
--
2.9.0
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