コード例 #1
0
ファイル: msdp.c プロジェクト: rupakd/drift-sensor
/*
 * Write data in pg-flash
 *
 */
void write_pg_flash_msdp(__msdp_out_data * const pOutData, const __msdp_wr_data * const pWrData) {
    pOutData->len = 0;

    if (pWrData->len > 0 && pWrData->len < 27) {
        // header
        pOutData->pBuff[pOutData->len++] = SDP_HEADER_x07;
        pOutData->pBuff[pOutData->len++] = SDP_HEADER_x0E;

        // data len
        pOutData->pBuff[pOutData->len++] = pWrData->len + 4;  // cmd(1byte) + addr(3bytes) + data

        // cmd 'W'
        pOutData->pBuff[pOutData->len++] = 0x35;
        pOutData->pBuff[pOutData->len++] = 0x37;

        // addr
        __union_addr uaddr = {pWrData->addr};
        for (uint16_t i = 0; i < 3; i++) {
            pOutData->pBuff[pOutData->len++] = nibble_to_hex(uaddr.data8[2 - i] >> 4, 'X');
            pOutData->pBuff[pOutData->len++] = nibble_to_hex(uaddr.data8[2 - i] & 0xF, 'X');
        }

        // data
        for (uint16_t i = 0; i < pWrData->len; i++) {
            pOutData->pBuff[pOutData->len++] = nibble_to_hex(pWrData->pBuff[i] >> 4, 'X');
            pOutData->pBuff[pOutData->len++] = nibble_to_hex(pWrData->pBuff[i] & 0xF, 'X');
        }

        // crc
        pOutData->pBuff[pOutData->len] = calc_crc_sdp(pOutData->pBuff + 3, pOutData->len - 3);
        pOutData->len++;
    }
コード例 #2
0
static void to_hex(uint8_t* input, size_t len, char* output) {
    for (int i = 0; i < len; ++i) {
        uint8_t ch = input[i];
        uint8_t hi = (ch & 0xF0) >> 4;
        uint8_t lo = (ch & 0x0F);
        output[2*i] = nibble_to_hex(hi);
        output[2*i + 1] = nibble_to_hex(lo);
    }
    output[2*len] = '\0';
}