uart-basic: add f0, requires newest code too

stupid f072 disco doesn't have usart2 available

tests/uart-basic/Makefile.stm32f072disco

@@ -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 = stm32f072disco
+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%, . $(SHARED_DIR))
+
+OPENCM3_DIR=../../libopencm3/
+
+### This section can go to an arch shared rules eventually...
+DEVICE=stm32f072rb
+#OOCD_INTERFACE = stlink-v2
+#OOCD_TARGET = stm32f0x
+OOCD_FILE = ../../openocd/openocd.$(BOARD).cfg
+
+include ../../rules.mk

tests/uart-basic/main-stm32f072disco.c

@@ -0,0 +1,64 @@
+/*
+ * 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/gpio.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/usart.h>
+
+#include "uart-basic.h"
+
+#define LED_DISCO_GREEN_RCC RCC_GPIOC
+#define LED_DISCO_GREEN_PORT GPIOC
+#define LED_DISCO_GREEN_PIN GPIO9
+
+void usart3_4_isr(void)
+{
+	ub_irq_handler();	
+}
+
+static void board_init(void) {
+	rcc_periph_clock_enable(RCC_GPIOB);
+        gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO10|GPIO11);
+	/* usart3 is AF4 */
+        gpio_set_af(GPIOB, GPIO_AF4, GPIO10|GPIO11);
+}
+
+int main(void)
+{
+	int i;
+	int j = 0;
+	rcc_clock_setup_in_hsi48_out_48mhz();
+	board_init();
+	struct ub_hw ub = {
+		.uart = USART3,
+		.uart_nvic = NVIC_USART3_4_IRQ,
+		.uart_rcc = RCC_USART3,
+	};
+	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;
+}

tests/uart-basic/uart-basic.c

@@ -65,7 +65,7 @@ void ub_task(void)
 
 void ub_irq_handler(void)
 {
-	if (usart_get_flag(ub->uart, USART_SR_RXNE)) {
+	if (usart_get_flag(ub->uart, USART_FLAG_RXNE)) {
 		last_rxb = usart_recv(ub->uart);
 	}
 }