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.

main.cpp@2:d53a7002da28, 2014-03-05 (annotated)

Committer:
dreschpe
Date:
Wed Mar 05 21:44:00 2014 +0000
Revision:
2:d53a7002da28
Parent:
1:aa61af968c8a 
typo

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bcostm 0:21b36798fd00 1 #include "mbed.h"
dreschpe 1:aa61af968c8a 2 #include "stm32f4xx_hal.h"
dreschpe 1:aa61af968c8a 3 #include "ST_F401_84MHZ.h"
bcostm 0:21b36798fd00 4
bcostm 0:21b36798fd00 5 SPI device(SPI_MOSI, SPI_MISO, SPI_SCK);
bcostm 0:21b36798fd00 6
bcostm 0:21b36798fd00 7 int main() {
bcostm 0:21b36798fd00 8 int i = 0;
dreschpe 1:aa61af968c8a 9 SystemClock_Config_84MHz_internal(); // speed up to 84 MHz
dreschpe 1:aa61af968c8a 10 HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_1); // output SYSCLOCK to pin PC9 to monitor frequency
dreschpe 1:aa61af968c8a 11 device.format(8,0);
dreschpe 1:aa61af968c8a 12 device.frequency(20000000); // 20 MHz SPI Clock to test the clock setting
dreschpe 1:aa61af968c8a 13
bcostm 0:21b36798fd00 14 while(1) {
bcostm 0:21b36798fd00 15 device.write(0x55);
bcostm 0:21b36798fd00 16 device.write(i++);
bcostm 0:21b36798fd00 17 device.write(0xE0);
bcostm 0:21b36798fd00 18 wait_us(50);
dreschpe 2:d53a7002da28 19 }
bcostm 0:21b36798fd00 20 }
bcostm 0:21b36798fd00 21