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Make own interrupt routine selection array as RMT api only can have one interrupt routine with one argument

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This commit is contained in:
Harald Barth 2022-08-02 01:22:36 +02:00
parent e5ce76e703
commit 33c9155f6e
2 changed files with 18 additions and 9 deletions
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21
DCCRMT.cpp
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@ -57,9 +57,15 @@ void setEOT(rmt_item32_t* item) {
item->val = 0; item->val = 0;
} }
// This is an array that contains the this pointers
// to all uses channel objects. This is used to determine
// which of the channels was triggering the ISR as there
// is only ONE common ISR routine for all channels.
RMTChannel *channelHandle[8] = { 0 };
void IRAM_ATTR interrupt(rmt_channel_t channel, void *t) { void IRAM_ATTR interrupt(rmt_channel_t channel, void *t) {
RMTChannel *tt = (RMTChannel *)t; RMTChannel *tt = channelHandle[channel];
tt->RMTinterrupt(); if (tt) tt->RMTinterrupt();
} }
RMTChannel::RMTChannel(byte pin, bool isMain) { RMTChannel::RMTChannel(byte pin, bool isMain) {
@ -133,18 +139,17 @@ RMTChannel::RMTChannel(byte pin, bool isMain) {
DIAG(F("Register interrupt on core %d"), xPortGetCoreID()); DIAG(F("Register interrupt on core %d"), xPortGetCoreID());
ESP_ERROR_CHECK(rmt_set_tx_loop_mode(channel, true)); ESP_ERROR_CHECK(rmt_set_tx_loop_mode(channel, true));
rmt_register_tx_end_callback(interrupt, this); channelHandle[channel] = this; // used by interrupt
rmt_register_tx_end_callback(interrupt, 0);
rmt_set_tx_intr_en(channel, true); rmt_set_tx_intr_en(channel, true);
DIAG(F("Starting channel %d signal generator"), config.channel); DIAG(F("Starting channel %d signal generator for %s"), config.channel, isMainTrack ? "MAIN" : "PROG");
// send one bit to kickstart the signal, remaining data will come from the // send one bit to kickstart the signal, remaining data will come from the
// packet queue. We intentionally do not wait for the RMT TX complete here. // packet queue. We intentionally do not wait for the RMT TX complete here.
//rmt_write_items(channel, preamble, preambleLen, false); //rmt_write_items(channel, preamble, preambleLen, false);
RMTprefill(); RMTprefill();
preambleNext = true;
dataReady = false; dataReady = false;
RMTinterrupt();
} }
void RMTChannel::RMTprefill() { void RMTChannel::RMTprefill() {
@ -161,10 +166,10 @@ int RMTChannel::RMTfillData(const byte buffer[], byte byteCount, byte repeatCoun
// to the HW. dataRepeat on the other hand signals back to // to the HW. dataRepeat on the other hand signals back to
// the caller of this function if the data has been sent enough // the caller of this function if the data has been sent enough
// times (0 to 3 means 1 to 4 times in total). // times (0 to 3 means 1 to 4 times in total).
if (dataReady == true)
return 1000;
if (dataRepeat > 0) // we have still old work to do if (dataRepeat > 0) // we have still old work to do
return dataRepeat; return dataRepeat;
if (dataReady == true) // the packet is not copied out yet
return 1000;
if (DATA_LEN(byteCount) > maxDataLen) { // this would overun our allocated memory for data if (DATA_LEN(byteCount) > maxDataLen) { // this would overun our allocated memory for data
DIAG(F("Can not convert DCC bytes # %d to DCC bits %d, buffer too small"), byteCount, maxDataLen); DIAG(F("Can not convert DCC bytes # %d to DCC bits %d, buffer too small"), byteCount, maxDataLen);
return -1; // something very broken, can not convert packet return -1; // something very broken, can not convert packet

6
DCCRMT.h
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@ -36,6 +36,11 @@ class RMTChannel {
void RMTprefill(); void RMTprefill();
//int RMTfillData(dccPacket packet); //int RMTfillData(dccPacket packet);
int RMTfillData(const byte buffer[], byte byteCount, byte repeatCount); int RMTfillData(const byte buffer[], byte byteCount, byte repeatCount);
inline bool busy() {
if (dataRepeat > 0) // we have still old work to do
return true;
return dataReady;
};
private: private:
@ -50,7 +55,6 @@ class RMTChannel {
byte dataLen; byte dataLen;
byte maxDataLen; byte maxDataLen;
// flags // flags
volatile bool preambleNext = true; // alternate between preamble and content
volatile bool dataReady = false; // do we have real data available or send idle volatile bool dataReady = false; // do we have real data available or send idle
volatile byte dataRepeat = 0; volatile byte dataRepeat = 0;
}; };