From 3c53aa4ec306b2a10219689f5efc4f34fa7ff537 Mon Sep 17 00:00:00 2001
From: Karl Palsson <karlp@tweak.net.au>
Date: Wed, 25 Oct 2017 23:54:17 +0000
Subject: uart-basic: add l4

---
 tests/uart-basic/Makefile.stm32l476disco | 26 +++++++++++
 tests/uart-basic/main-stm32l476disco.c   | 77 ++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100644 tests/uart-basic/Makefile.stm32l476disco
 create mode 100644 tests/uart-basic/main-stm32l476disco.c

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;
+}
-- 
cgit