gomaomao/DIY-Multiprotocol-TX-Module
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FrSky1 CRC messed up...

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pascallanger 2016-09-01 13:42:33 +02:00
parent 8150504ea0
commit 97956b6c5e
1 changed files with 18 additions and 10 deletions
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28
Multiprotocol/FrSky1_cc2500.ino
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@ -60,14 +60,14 @@ static void __attribute__((unused)) FRSKY1_init()
CC2500_Strobe(CC2500_SIDLE); // Go to idle...
}
static uint8_t __attribute__((unused)) FRSKY1_crc8(uint8_t result, uint8_t *data, uint8_t len, uint8_t polynomial)
static uint8_t __attribute__((unused)) FRSKY1_crc8(uint8_t result, uint8_t *data, uint8_t len)
{
for(uint8_t i = 0; i < len; i++)
{
result = result ^ data[i];
for(uint8_t j = 0; j < 8; j++)
if(result & 0x80)
result = (result << 1) ^ polynomial;
result = (result << 1) ^ 0x07;
else
result = result << 1;
}
@ -83,7 +83,15 @@ static uint8_t __attribute__((unused)) FRSKY1_crc8_le(uint8_t init, uint8_t *dat
result = (result << 1) | (init & 0x01);
init >>= 1;
}
return FRSKY1_crc8(result,data,len,0x83);
for(uint8_t i = 0; i < len; i++)
{
result = result ^ data[i];
for(uint8_t j = 0; j < 8; j++)
if(result & 0x01)
result = (result >> 1) ^ 0x83;
else
result = result >> 1;
}
}
static void __attribute__((unused)) FRSKY1_build_bind_packet()
@ -103,7 +111,7 @@ static void __attribute__((unused)) FRSKY1_build_bind_packet()
packet[11] = 0x00;
packet[12] = 0x00;
packet[13] = 0x00;
packet[14] = FRSKY1_crc8(0x93, packet, 14, 0x07);
packet[14] = FRSKY1_crc8(0x93, packet, 14);
}
static uint8_t __attribute__((unused)) FRSKY1_calc_channel()
@ -135,7 +143,7 @@ static void __attribute__((unused)) FRSKY1_build_data_packet()
packet[2*i + 6] = value & 0xff;
packet[2*i + 7] = value >> 8;
}
packet[14] = FRSKY1_crc8(crc8, packet, 14, 0x07);
packet[14] = FRSKY1_crc8(crc8, packet, 14);
}
static uint16_t ReadFRSKY1()
@ -157,11 +165,6 @@ static uint16_t ReadFRSKY1()
if (state >= FRSKY_DATA1)
{
CC2500_Strobe(CC2500_SIDLE);
if (option != prev_option)
{
CC2500_WriteReg(CC2500_0C_FSCTRL0, option);
prev_option=option;
}
uint8_t chan = FRSKY1_calc_channel();
CC2500_WriteReg(CC2500_0A_CHANNR, chan * 5 + 6);
FRSKY1_build_data_packet();
@ -169,6 +172,11 @@ static uint16_t ReadFRSKY1()
CC2500_WriteData(packet, packet[0]+1);
if (state == FRSKY_DATA5)
{
if (option != prev_option)
{
CC2500_WriteReg(CC2500_0C_FSCTRL0, option);
prev_option=option;
}
CC2500_SetPower();
state = FRSKY_DATA1;
}