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11 years, 6 months ago.
SPI configuration problem
Can anyone suggest me the SPI0 setting for the FRDM KL25Z board. I tried simple module example of SPI given in the example but my MOSI port always transmit 0xFF Please input your suggestion.
1 Answer
11 years, 6 months ago.
Please see my program as follows: For SS active high
The problem with the following program , is when i decode it using Osciiloscope ,it gives me garbage data instead of giving me 0x80 , 0x07 , 0x01 , 0x02
- include "mbed.h"
- include "SPI.h"
SPI temp_sensor(PTD2,PTD3,PTD1); mosi D11 , miso D12 , sclk D13 DigitalOut cs(PTD0); D10 Serial Pc(USBTX,USBRX);
int main() { while(1){
cs = 0;
Setup the spi for 8 bit data, high steady state clock, second edge capture, with a 1KHz clock rate temp_sensor.format(8,0); temp_sensor.frequency(1000);
Wait for some time before starting wait_ms(1000); temp_sensor.write(0x80);
temp_sensor.write(0x07);
temp_sensor.write(0x01);
temp_sensor.write(0x02); wait_ms(1000);
cs = 0;
}
}
Please use <<code>> and <</code>> around it to make it better readable.
I don't see a reason why your code doesn't work. Some things are a bit weird, but not that it shouldn't work. One thing you can try is increasing the frequency, it might be below the minimum frequency the KL25Z can generate.
posted by 18 Mar 2014
Which program did you run?
posted by Martin Kojtal 18 Mar 2014Please see my program as follows: For SS active high
The problem with the following program , is when i decode it using Osciiloscope ,it gives me garbage data instead of giving me 0x80 , 0x07 , 0x01 , 0x02
include "mbed.h" include "SPI.h" SPI temp_sensor(PTD2,PTD3,PTD1); mosi D11 , miso D12 , sclk D13 DigitalOut cs(PTD0); D10 Serial Pc(USBTX,USBRX);
int main() { while(1){
cs = 0;
Setup the spi for 8 bit data, high steady state clock, second edge capture, with a 1KHz clock rate temp_sensor.format(8,0); temp_sensor.frequency(1000);
Wait for some time before starting wait_ms(1000); temp_sensor.write(0x80);
temp_sensor.write(0x07);
temp_sensor.write(0x01);
temp_sensor.write(0x02); wait_ms(1000);
cs = 0;
} Please see my program as follows: For SS active high
The problem with the following program , is when i decode it using Osciiloscope ,it gives me garbage data instead of giving me 0x80 , 0x07 , 0x01 , 0x02
include "mbed.h" include "SPI.h" SPI temp_sensor(PTD2,PTD3,PTD1); mosi D11 , miso D12 , sclk D13 DigitalOut cs(PTD0); D10 Serial Pc(USBTX,USBRX);
int main() { while(1){
cs = 0;
Setup the spi for 8 bit data, high steady state clock, second edge capture, with a 1KHz clock rate temp_sensor.format(8,0); temp_sensor.frequency(1000);
Wait for some time before starting wait_ms(1000); temp_sensor.write(0x80);
temp_sensor.write(0x07);
temp_sensor.write(0x01);
temp_sensor.write(0x02); wait_ms(1000);
cs = 0;
}
}
posted by Nirmal Panchal 18 Mar 2014