Peter Drescher / Mbed 2 deprecated Nucleo_spi_master_20MHz

Test program to show cpu running at 84MHz

Dependencies:   ST_401_84MHZ mbed

Speed up the CPU to 84MHz to get a SPI clock of 20MHz.

Diff: main.cpp

Revision:
1:aa61af968c8a
Parent:
0:21b36798fd00
Child:
2:d53a7002da28
--- a/main.cpp	Fri Feb 21 12:38:59 2014 +0000
+++ b/main.cpp	Wed Mar 05 21:41:36 2014 +0000
@@ -1,9 +1,16 @@
 #include "mbed.h"
+#include "stm32f4xx_hal.h" 
+#include "ST_F401_84MHZ.h"
  
 SPI device(SPI_MOSI, SPI_MISO, SPI_SCK);
  
 int main() {
     int i = 0;
+    SystemClock_Config_84MHz_internal();                                     // speed up to 84 MHz
+    HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_1);        // output SYSCLOCK to pin PC9 to monitor frequency
+    device.format(8,0); 
+    device.frequency(20000000);     // 20 MHz SPI Clock to test the clock setting
+
     while(1) {
         device.write(0x55);
         device.write(i++);