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AP_RangeFinder: modified regarding to advices from @magicrub - san.

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This commit is contained in:
Shingo Matsuura 2016-11-05 02:20:43 +09:00 committed by Randy Mackay
parent 47d8e96f06
commit 023c613196
2 changed files with 39 additions and 22 deletions
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50
libraries/AP_RangeFinder/AP_RangeFinder_LeddarOne.cpp
View File

@ -57,11 +57,14 @@ bool AP_RangeFinder_LeddarOne::get_reading(uint16_t &reading_cm)
switch (modbus_status) {
case LEDDARONE_MODBUS_PRE_SEND_REQUEST:
case LEDDARONE_MODBUS_INIT:
// clear buffer and buffer_len
memset(read_buffer, 0, sizeof(read_buffer));
read_len = 0;
modbus_status = LEDDARONE_MODBUS_PRE_SEND_REQUEST;
break;
case LEDDARONE_MODBUS_PRE_SEND_REQUEST:
// send a request message for Modbus function 4
if (send_request() != LEDDARONE_OK) {
// TODO: handle LEDDARONE_ERR_SERIAL_PORT
@ -78,7 +81,8 @@ bool AP_RangeFinder_LeddarOne::get_reading(uint16_t &reading_cm)
} else {
if (AP_HAL::millis() - last_sending_request_ms > 200) {
// reset mod_bus status to read new buffer
modbus_status = LEDDARONE_MODBUS_PRE_SEND_REQUEST;
// if read_len is zero, send request without initialize
modbus_status = read_len == 0 ? LEDDARONE_MODBUS_PRE_SEND_REQUEST : LEDDARONE_MODBUS_INIT;
}
}
break;
@ -91,19 +95,14 @@ bool AP_RangeFinder_LeddarOne::get_reading(uint16_t &reading_cm)
reading_cm = sum_distance / number_detections;
// reset mod_bus status to read new buffer
modbus_status = LEDDARONE_MODBUS_PRE_SEND_REQUEST;
modbus_status = LEDDARONE_MODBUS_INIT;
return true;
}
// keep reading next buffer
else if (leddarone_status == LEDDARONE_READING_BUFFER) {
// not change mod_bus status, keep reading
break;
}
// leddarone_status is LEDDARONE_ERR_*
else {
// reset mod_bus status to read new buffer
modbus_status = LEDDARONE_MODBUS_PRE_SEND_REQUEST;
// if status is not reading buffer, reset mod_bus status to read new buffer
else if (leddarone_status != LEDDARONE_READING_BUFFER) {
// if read_len is zero, send request without initialize
modbus_status = read_len == 0 ? LEDDARONE_MODBUS_PRE_SEND_REQUEST : LEDDARONE_MODBUS_INIT;
}
break;
}
@ -161,7 +160,7 @@ bool AP_RangeFinder_LeddarOne::CRC16(uint8_t *aBuffer, uint8_t aLength, bool aCh
*/
LeddarOne_Status AP_RangeFinder_LeddarOne::send_request(void)
{
uint8_t send_buffer[10] = {0};
uint8_t send_buffer[8] = {0};
uint8_t index = 0;
uint32_t nbytes = uart->available();
@ -175,14 +174,12 @@ LeddarOne_Status AP_RangeFinder_LeddarOne::send_request(void)
}
// Modbus read input register (function code 0x04)
// send_buffer[3] = 20: Address of first register to read
// send_buffer[5] = 10: The number of consecutive registers to read
send_buffer[0] = LEDDARONE_DEFAULT_ADDRESS;
send_buffer[1] = 0x04;
send_buffer[2] = 0;
send_buffer[3] = 20;
send_buffer[3] = 20; // Address of first register to read
send_buffer[4] = 0;
send_buffer[5] = 10;
send_buffer[5] = 10; // The number of consecutive registers to read
// CRC16
CRC16(send_buffer, 6, false);
@ -198,6 +195,25 @@ LeddarOne_Status AP_RangeFinder_LeddarOne::send_request(void)
/*
parse a response message from Modbus
-----------------------------------------------
[ read buffer packet ]
-----------------------------------------------
0: slave address (LEDDARONE_DEFAULT_ADDRESS)
1: functions code
2: ?
3-4-5-6: timestamp
7-8: internal temperature
9: ?
10: number of detections
11-12: first distance
13-14: first amplitude
15-16: second distance
17-18: second amplitude
19-20: third distances
21-22: third amplitude
23: CRC Low
24: CRC High
-----------------------------------------------
*/
LeddarOne_Status AP_RangeFinder_LeddarOne::parse_response(uint8_t &number_detections)
{

11
libraries/AP_RangeFinder/AP_RangeFinder_LeddarOne.h
View File

@ -12,7 +12,7 @@
// LeddarOne status
enum LeddarOne_Status {
LEDDARONE_OK = 0,
LEDDARONE_READING_BUFFER = 1,
LEDDARONE_READING_BUFFER = 1,
LEDDARONE_ERR_BAD_CRC = -1,
LEDDARONE_ERR_NO_RESPONSES = -2,
LEDDARONE_ERR_BAD_RESPONSE = -3,
@ -23,9 +23,10 @@ enum LeddarOne_Status {
// LeddarOne Modbus status
enum LeddarOne_ModbusStatus {
LEDDARONE_MODBUS_PRE_SEND_REQUEST = 0,
LEDDARONE_MODBUS_SENT_REQUEST,
LEDDARONE_MODBUS_AVAILABLE
LEDDARONE_MODBUS_INIT = 0,
LEDDARONE_MODBUS_PRE_SEND_REQUEST,
LEDDARONE_MODBUS_SENT_REQUEST,
LEDDARONE_MODBUS_AVAILABLE
};
class AP_RangeFinder_LeddarOne : public AP_RangeFinder_Backend
@ -62,7 +63,7 @@ private:
uint16_t detections[LEDDARONE_DETECTIONS_MAX];
uint32_t sum_distance;
LeddarOne_ModbusStatus modbus_status = LEDDARONE_MODBUS_PRE_SEND_REQUEST;
LeddarOne_ModbusStatus modbus_status = LEDDARONE_MODBUS_INIT;
uint8_t read_buffer[25];
uint32_t read_len;
};