diff options
| -rw-r--r-- | tests/uart-basic/Makefile.stm32l476disco | 26 | ||||
| -rw-r--r-- | tests/uart-basic/main-stm32l476disco.c | 77 |
2 files changed, 103 insertions, 0 deletions
diff --git a/tests/uart-basic/Makefile.stm32l476disco b/tests/uart-basic/Makefile.stm32l476disco new file mode 100644 index 0000000..79b8ab7 --- /dev/null +++ b/tests/uart-basic/Makefile.stm32l476disco @@ -0,0 +1,26 @@ +# This is just a makefile. +# Consider it released into the public domain, or, where not available, +# available under your choice of BSD2clause, MIT, X11, ISC or Apache2 licenses +# Karl Palsson <karlp@tweak.net.au> +BOARD = stm32l476disco +PROJECT = uart-basic-$(BOARD) +BUILD_DIR = bin-$(BOARD) + +SHARED_DIR = ../../shared + +CFILES = main-$(BOARD).c +CFILES += uart-basic.c + +VPATH += $(SHARED_DIR) + +INCLUDES += $(patsubst %,-I%, . $(SHARED_DIR)) + +OPENCM3_DIR=../../libopencm3/ + +### This section can go to an arch shared rules eventually... +DEVICE=stm32l476vgt6 +#OOCD_INTERFACE = stlink-v2-1 +#OOCD_TARGET = stm32l4x +OOCD_FILE = ../../openocd/openocd.$(BOARD).cfg + +include ../../rules.mk diff --git a/tests/uart-basic/main-stm32l476disco.c b/tests/uart-basic/main-stm32l476disco.c new file mode 100644 index 0000000..82c98f0 --- /dev/null +++ b/tests/uart-basic/main-stm32l476disco.c @@ -0,0 +1,77 @@ +/* + * Oct 2017 Karl Palsson <karlp@tweak.net.au> + */ + +#include <errno.h> +#include <stdio.h> +#include <unistd.h> +#include <libopencm3/cm3/nvic.h> +#include <libopencm3/stm32/flash.h> +#include <libopencm3/stm32/gpio.h> +#include <libopencm3/stm32/pwr.h> +#include <libopencm3/stm32/rcc.h> +#include <libopencm3/stm32/usart.h> + +#include "uart-basic.h" + +#define LED_DISCO_GREEN_RCC RCC_GPIOE +#define LED_DISCO_GREEN_PORT GPIOE +#define LED_DISCO_GREEN_PIN GPIO8 + +void usart2_isr(void) +{ + ub_irq_handler(); +} + +static void setup_rcc_hack(void) +{ + pwr_set_vos_scale(PWR_SCALE1); + flash_set_ws(FLASH_ACR_LATENCY_2WS); + rcc_set_msi_range(RCC_CR_MSIRANGE_48MHZ); + + /* ok, we manually poked around, let the lib know */ + rcc_apb1_frequency = rcc_apb2_frequency = 48e6; +} + +static void board_init(void) +{ + rcc_periph_clock_enable(RCC_GPIOD); + gpio_mode_setup(GPIOD, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO5 | GPIO6); + /* usart2 is AF7 */ + gpio_set_af(GPIOD, GPIO_AF7, GPIO5 | GPIO6); +} + +int main(void) +{ + int i; + int j = 0; + setup_rcc_hack(); + board_init(); + struct ub_hw ub = { + .uart = USART2, + .uart_nvic = NVIC_USART2_IRQ, + .uart_rcc = RCC_USART2, + }; + ub_init(&ub); + printf("hi guys!\n"); + /* green led for ticking */ + rcc_periph_clock_enable(LED_DISCO_GREEN_RCC); + gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, + LED_DISCO_GREEN_PIN); + + + while (1) { + gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN); + + for (i = 0; i < 0xa0000; i++) { /* Wait a bit. */ + __asm__("NOP"); + } + ub_task(); + gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN); + for (i = 0; i < 0xa0000; i++) { /* Wait a bit. */ + __asm__("NOP"); + } + } + + return 0; +} |