begriffs open source - cmsis/blob - CMSIS/DoxyGen/Driver/src/I2C_SlaveDemo.c

   1 #include "Driver_I2C.h"
   2
   3 // I2C driver instance
   4 extern ARM_DRIVER_I2C Driver_I2C0;
   5 static ARM_DRIVER_I2C *i2cDev = &Driver_I2C0;
   6
   7 static volatile uint32_t event = 0;
   8
   9 static void I2C_DrvEvent (uint32_t e) {
  10     event |= e;
  11 }
  12
  13 int main (void) {
  14     uint8_t cnt = 0;
  15
  16     /* Initialize I2C peripheral */
  17     i2cDev->Initialize(I2C_DrvEvent);
  18
  19     /* Power-on I2C peripheral */
  20     i2cDev->PowerControl(ARM_POWER_FULL);
  21
  22     /* Configure I2C bus*/
  23     i2cDev->Control(ARM_I2C_OWN_ADDRESS, 0x78);
  24
  25     while (1) {
  26         /* Receive chunk */
  27         i2cDev->SlaveReceive(&cnt, 1);
  28         while ((event & ARM_event_TRANSFER_DONE) == 0);
  29         event &= ~ARM_event_TRANSFER_DONE;
  30
  31         /* Transmit chunk back */
  32         i2cDev->SlaveTransmit(&cnt, 1);
  33         while ((event & ARM_event_TRANSFER_DONE) == 0);
  34         event &= ~ARM_event_TRANSFER_DONE;
  35     }
  36 }