1 files changed, 164 insertions, 0 deletions

diff --git a/lib/chibios-contrib/testhal/NRF51/NRF51822/I2C/main.c b/lib/chibios-contrib/testhal/NRF51/NRF51822/I2C/main.c
new file mode 100644
index 000000000..d0c437288
--- /dev/null
+++ b/lib/chibios-contrib/testhal/NRF51/NRF51822/I2C/main.c
@@ -0,0 +1,164 @@
+/*
+    Copyright (C) 2015 Stephen Caudle
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/*
+    This demo:
+    1) Writes bytes to the EEPROM
+    2) Reads the same bytes back
+    3) Inverts the byte values
+    4) Writes them
+    5) Reads them back
+ */
+
+#include <stdlib.h>
+
+#include "ch.h"
+#include "hal.h"
+
+#define I2C_ADDR 0x50
+#define I2C_FAKE_ADDR 0x4C
+#define EEPROM_START_ADDR 0x00
+
+/*
+ * EEPROM thread.
+ */
+static THD_WORKING_AREA(PollEepromThreadWA, 1024);
+static THD_FUNCTION(PollEepromThread, arg) {
+
+  unsigned i;
+  uint8_t tx_data[5];
+  uint8_t rx_data[4];
+  msg_t status;
+
+  (void)arg;
+
+  chRegSetThreadName("PollEeprom");
+
+  /* set initial data to write */
+  tx_data[0] = EEPROM_START_ADDR;
+  tx_data[1] = 0xA0;
+  tx_data[2] = 0xA1;
+  tx_data[3] = 0xA2;
+  tx_data[4] = 0xA3;
+
+  while (true) {
+
+    /* write out initial data */
+    i2cAcquireBus(&I2CD1);
+    status = i2cMasterTransmitTimeout(&I2CD1, I2C_ADDR, tx_data, sizeof(tx_data), NULL, 0, TIME_INFINITE);
+    i2cReleaseBus(&I2CD1);
+    osalDbgCheck(MSG_OK == status);
+
+    /* read back inital data */
+    osalThreadSleepMilliseconds(2);
+    i2cAcquireBus(&I2CD1);
+    status = i2cMasterTransmitTimeout(&I2CD1, I2C_ADDR, tx_data, 1, rx_data, sizeof(rx_data), TIME_INFINITE);
+    i2cReleaseBus(&I2CD1);
+    osalDbgCheck(MSG_OK == status);
+
+    /* invert the data */
+    for (i = 1; i < sizeof(tx_data); i++)
+      tx_data[i] ^= 0xff;
+
+    /* write out inverted data */
+    osalThreadSleepMilliseconds(2);
+    i2cAcquireBus(&I2CD1);
+    status = i2cMasterTransmitTimeout(&I2CD1, I2C_ADDR, tx_data, sizeof(tx_data), NULL, 0, TIME_INFINITE);
+    i2cReleaseBus(&I2CD1);
+    osalDbgCheck(MSG_OK == status);
+
+    /* read back inverted data */
+    osalThreadSleepMilliseconds(2);
+    i2cAcquireBus(&I2CD1);
+    status = i2cMasterTransmitTimeout(&I2CD1, I2C_ADDR, tx_data, 1, rx_data, sizeof(rx_data), TIME_INFINITE);
+    i2cReleaseBus(&I2CD1);
+    osalDbgCheck(MSG_OK == status);
+
+    osalThreadSleepMilliseconds(TIME_INFINITE);
+  }
+}
+
+/*
+ * Fake polling thread.
+ */
+static THD_WORKING_AREA(PollFakeThreadWA, 256);
+static THD_FUNCTION(PollFakeThread, arg) {
+
+  (void)arg;
+
+  chRegSetThreadName("PollFake");
+  while (true) {
+
+    msg_t status;
+    uint8_t rx_data[2];
+    i2cflags_t errors;
+
+    i2cAcquireBus(&I2CD1);
+    status = i2cMasterReceiveTimeout(&I2CD1, I2C_FAKE_ADDR, rx_data, 2, TIME_MS2I(4));
+    i2cReleaseBus(&I2CD1);
+
+    if (status == MSG_RESET){
+      errors = i2cGetErrors(&I2CD1);
+      osalDbgCheck(I2C_ACK_FAILURE == errors);
+    }
+
+    palTogglePad(IOPORT1, LED1); /* on */
+    osalThreadSleepMilliseconds(1000);
+  }
+}
+
+/*
+ * I2C1 config.
+ */
+static const I2CConfig i2cfg = {
+    400000,
+    I2C_SCL,
+    I2C_SDA,
+};
+
+/*
+ * Entry point, note, the main() function is already a thread in the system
+ * on entry.
+ */
+int main(void) {
+
+  halInit();
+  chSysInit();
+
+  i2cStart(&I2CD1, &i2cfg);
+
+  /* Create EEPROM thread. */
+  chThdCreateStatic(PollEepromThreadWA,
+          sizeof(PollEepromThreadWA),
+          NORMALPRIO,
+          PollEepromThread,
+          NULL);
+
+  /* Create not responding thread. */
+  chThdCreateStatic(PollFakeThreadWA,
+          sizeof(PollFakeThreadWA),
+          NORMALPRIO,
+          PollFakeThread,
+          NULL);
+
+  /* main loop handles LED */
+  while (true) {
+    palTogglePad(IOPORT1, LED0); /* on */
+    osalThreadSleepMilliseconds(500);
+  }
+
+  return 0;
+}