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+/*
+ * utils.c
+ *
+ * Copyright (C) 2018, 2019 Mind Chasers Inc.
+ *
+ * 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.
+ *
+ */
+
+/* Standard C Included Files */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+/* SDK Included Files */
+#include "board.h"
+#include "fsl_debug_console.h"
+#include "fsl_i2c.h"
+
+#include "main.h"
+
+/*
+ * Stop dumping the data when we msbit is set
+ */
+void dump_data(uint8_t * pdata, size_t size, bool i2c_data ) {
+
+ for (uint32_t i = 0U; i < size; i++) {
+ if (!i2c_data && (i % 8 == 0)) {
+ printf("\r\n");
+ }
+
+ // printf("0x%2x ", *pdata++);
+ PUTCHAR( *pdata++ & 0x7f );
+
+ if (i2c_data && (*pdata & 0x80) ) {
+ // printf("0x%2x ", *pdata);
+ PUTCHAR( *pdata & 0x7f );
+ break;
+ }
+
+ }
+
+ PRINTF("\r\n");
+}
+
+uint8_t get_cmd(uint8_t * pdata, size_t size) {
+ int i=0;
+ char buf;
+
+ if (size <= 1)
+ return 0;
+
+ buf = (char) GETCHAR();
+ PUTCHAR(buf);
+
+ if (buf == 13 ) {
+ PUTCHAR(10); // LF
+ return 0;
+ }
+
+ *pdata = buf; // capture the cmd
+
+ for(i=1; i<size; i++ ) {
+ buf = GETCHAR();
+ PUTCHAR(buf);
+
+ // Convert 0 through 9 ASCII to int
+ if (buf >= 48 && buf <= 57) {
+ buf = buf-48;
+ }
+
+ // Convert A through F ASCII to int base 16 (hex)
+ else if (buf >= 65 && buf <= 70) {
+ buf = buf-55;
+ }
+
+ // Convert a through f ASCII to int base 16 (hex)
+ else if (buf >= 97 && buf <= 102) {
+ buf = buf-87;
+ }
+
+ else if (buf == 13) {
+ pdata[i] = buf;
+ break;
+ }
+ else {
+ PUTCHAR(10); // LF
+ return 0; // error
+ }
+
+ pdata[i] = buf;
+
+ }
+
+ PUTCHAR(10);
+ return i+1;
+
+}
+
+/* convert ASCII hex characters to integers */
+uint8_t ascii_to_bin(uint8_t data) {
+ uint8_t temp = 0;
+ if (data > 0x39) {
+ temp = data - 0x57; // a should map to 10 and so on
+ }
+ else {
+ temp = data - 0x30;
+ }
+ return temp;
+}
+
+status_t i2c_write(i2c_master_transfer_t* pxfer, uint8_t devaddr, uint8_t * pdata,
+ size_t size) {
+ status_t result = kStatus_Success;
+ pxfer->slaveAddress = devaddr;
+ pxfer->direction = kI2C_Write;
+ pxfer->data = pdata;
+ pxfer->dataSize = size;
+ return( I2C_MasterTransferBlocking(I2C_MASTER_BASEADDR, pxfer));
+ if (result!=kStatus_Success) {
+ // printf("\r\n I2C Transfer Error \r\n");
+ return -1;
+ }
+ else {
+ return 0;
+ }
+}
+
+status_t i2c_read(i2c_master_transfer_t* pxfer, uint8_t devaddr, uint8_t * pdata,
+ size_t size) {
+ status_t result = kStatus_Success;
+ pxfer->slaveAddress = devaddr;
+ pxfer->direction = kI2C_Read;
+ pxfer->data = pdata;
+ pxfer->dataSize = size;
+ result = I2C_MasterTransferBlocking(I2C_MASTER_BASEADDR, pxfer);
+ if (result!=kStatus_Success) {
+ // printf("\r\n I2C Transfer Error \r\n");
+ return -1;
+ }
+ else {
+ return 0;
+ }
+
+}



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