spi-master: initial busy sending test stub.

Basic framework.  now we can build on it.

1 files changed, 103 insertions, 0 deletions

diff --git a/tests/spi-master/main-stm32l1-generic.c b/tests/spi-master/main-stm32l1-generic.c
new file mode 100644
index 0000000..1763995
--- /dev/null
+++ b/tests/spi-master/main-stm32l1-generic.c
@@ -0,0 +1,103 @@
+/*
+ * March 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/spi.h>
+#include <libopencm3/stm32/rcc.h>
+
+#include "trace.h"
+
+#include "hw.h"
+//#include "i2c-master.h"
+
+#define LED_DISCO_GREEN_PORT GPIOB
+#define LED_DISCO_GREEN_PIN GPIO7
+
+
+struct hw_detail hw_details = {
+	.periph = SPI2,
+	.periph_rcc = RCC_SPI2,
+	.periph_rst = RST_SPI2,
+	.pins = GPIO13| GPIO14 | GPIO15, /* SPI pins for setting AF with */
+	.port = GPIOB,
+	.port_rcc = RCC_GPIOB,
+	.trigger_rcc = RCC_GPIOB,
+	.trigger_port = GPIOB,
+	.trigger_pin = GPIO11,
+};
+
+
+/* provided in board files please*/
+/**
+ * Setup any gpios or anything hardware specific.
+ * Should _only_ be things that can't be done in shared init()
+ */
+static void hw_init(void)
+{
+	/* trigger pin gpio */
+	rcc_periph_clock_enable(hw_details.trigger_rcc);
+	gpio_mode_setup(hw_details.trigger_port, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, hw_details.trigger_pin);
+
+	/* spi control lines */
+	rcc_periph_clock_enable(hw_details.port_rcc);
+	gpio_mode_setup(hw_details.port, GPIO_MODE_AF, GPIO_PUPD_NONE, hw_details.pins);
+	gpio_set_output_options(hw_details.port, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, hw_details.pins);
+	gpio_set_af(hw_details.port, GPIO_AF5, hw_details.pins);
+}
+
+static void test_init(void)
+{
+        /* Setup SPI parameters. */
+	rcc_periph_clock_enable(hw_details.periph_rcc);
+        spi_init_master(hw_details.periph, SPI_CR1_BAUDRATE_FPCLK_DIV_16, SPI_CR1_CPOL_CLK_TO_0_WHEN_IDLE,
+                SPI_CR1_CPHA_CLK_TRANSITION_1, SPI_CR1_DFF_8BIT, SPI_CR1_MSBFIRST);
+        /* Ignore the stupid NSS pin. */
+        spi_enable_software_slave_management(hw_details.periph);
+        //spi_enable_ss_output(MRF_SPI);
+        spi_set_nss_high(hw_details.periph);
+        /* Finally enable the SPI. */
+        spi_enable(hw_details.periph);
+}
+
+static void test_task(void) {
+	static int i = 0;
+	printf("Test iteration %d\n", i++);
+	gpio_set(hw_details.trigger_port, hw_details.trigger_pin);
+	spi_xfer(hw_details.periph, 0xaa);
+	spi_xfer(hw_details.periph, 0x42);
+	spi_xfer(hw_details.periph, 0x69);
+	gpio_clear(hw_details.trigger_port, hw_details.trigger_pin);
+}
+
+static void setup(void)
+{
+	printf("hi guys!\n");
+	hw_init();
+	test_init();
+}
+
+
+int main(void)
+{
+	int i, j;
+	rcc_clock_setup_pll(&rcc_clock_config[RCC_CLOCK_VRANGE1_HSI_PLL_32MHZ]);
+	/* green led for ticking */
+	rcc_periph_clock_enable(RCC_GPIOB);
+	gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
+		LED_DISCO_GREEN_PIN);
+	setup();
+
+	while (1) {
+		test_task();
+		gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN);
+		for (i = 0; i < 0x800000; i++) { /* Wait a bit. */
+                        __asm__("NOP");
+                }
+	}
+	return 0;
+}