From 9b371b5189c368932d4dd15ca6904212cd59e83b Mon Sep 17 00:00:00 2001
From: Karl Palsson <karlp@tweak.net.au>
Date: Mon, 14 Mar 2016 21:34:18 +0000
Subject: fix l4 to run at 48Mhz and with a clock

---
 tests/adc-power/adc-power.c          |  1 +
 tests/adc-power/main-stm32l4-disco.c | 10 ++++++++++
 2 files changed, 11 insertions(+)

(limited to 'tests')

diff --git a/tests/adc-power/adc-power.c b/tests/adc-power/adc-power.c
index a188649..97a083a 100644
--- a/tests/adc-power/adc-power.c
+++ b/tests/adc-power/adc-power.c
@@ -66,6 +66,7 @@ void adc_power_init(void)
 	/* same same but different */
 	rcc_periph_clock_enable(RCC_ADC1);
 	ADC_CR(ADC1) &= ~ADC_CR_DEEPPWD;
+	RCC_CCIPR |= 3 << 28; // system clock as adc clock.  (with CKMODE == 0)
 	adc_enable_regulator(ADC1);
 
 #else
diff --git a/tests/adc-power/main-stm32l4-disco.c b/tests/adc-power/main-stm32l4-disco.c
index a23266f..ad21fcb 100644
--- a/tests/adc-power/main-stm32l4-disco.c
+++ b/tests/adc-power/main-stm32l4-disco.c
@@ -7,7 +7,9 @@
 #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 "trace.h"
@@ -18,6 +20,12 @@
 #define LED_DISCO_GREEN_PORT GPIOE
 #define LED_DISCO_GREEN_PIN GPIO8
 
+int hack(void) {
+	pwr_set_vos_scale(PWR_SCALE1);
+	flash_set_ws(FLASH_ACR_LATENCY_2WS);
+	rcc_set_msi_range(RCC_CR_MSIRANGE_48MHZ);
+	return 0;
+}
 
 int main(void)
 {
@@ -27,6 +35,8 @@ int main(void)
 	rcc_periph_clock_enable(RCC_GPIOE); // led
 	rcc_periph_clock_enable(RCC_GPIOA); // adcs
 	rcc_periph_clock_enable(RCC_GPIOC); // adcs
+	rcc_periph_clock_enable(RCC_PWR);
+	hack();
 	printf("hi guys!\n");
 	/* green led for ticking */
 	gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
-- 
cgit