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esp8266 uart with irq disabled

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This commit is contained in:
MichaelDvP
2020-06-02 14:01:35 +02:00
parent ba08fb65ef
commit 3300f1e757
6 changed files with 42 additions and 37 deletions
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2
platformio.ini
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@@ -100,4 +100,4 @@ build_type = release
platform = espressif32
board = wemos_d1_mini32
lib_deps = ${common.libs_core} ${common.libs_esp32}
build_flags = ${common.build_flags} ${common.debug_flags} -D PIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH
build_flags = ${common.build_flags} ${common.debug_flags} -D PIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH -D WEMOS_D1_32

4
src/sensors.h
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@@ -66,7 +66,11 @@ class Sensors {
#if defined(ESP8266)
static constexpr uint8_t SENSOR_GPIO = 14; // D5
#elif defined(ESP32)
#ifdef WEMOS_D1_32
static constexpr uint8_t SENSOR_GPIO = 18; // Wemos D1-32 for compatibility D5
#else
static constexpr uint8_t SENSOR_GPIO = 14;
#endif
#endif
enum class State { IDLE, READING, SCANNING };

7
src/system.h
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@@ -83,10 +83,13 @@ class System {
static constexpr uint8_t LED_GPIO = 2;
static constexpr uint8_t LED_ON = LOW;
#elif defined(ESP32)
// static constexpr uint8_t LED_GPIO = 5; // on Wemos D32
// static constexpr uint8_t LED_ON = LOW;
#ifdef WEMOS_D1_32
static constexpr uint8_t LED_GPIO = 2; // on Wemos D1-32
static constexpr uint8_t LED_ON = HIGH;
#else
static constexpr uint8_t LED_GPIO = 5;
static constexpr uint8_t LED_ON = LOW;
#endif
#else
static constexpr uint8_t LED_GPIO = 0;
static constexpr uint8_t LED_ON = 0;

5
src/uart/emsuart_esp32.h
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@@ -39,8 +39,13 @@
#define EMSUART_BAUD 9600 // uart baud rate for the EMS circuit
// customize the GPIO pins for RX and TX here
#ifdef WEMOS_D1_32
#define EMSUART_RXPIN 23 // 17 is UART2 RX. Use 23 for D7 on a Wemos D1-32 mini for backwards compatabilty
#define EMSUART_TXPIN 5 // 16 is UART2 TX. Use 5 for D8 on a Wemos D1-32 mini for backwards compatabilty
#else
#define EMSUART_RXPIN 17 // 17 is UART2 RX. Use 23 for D7 on a Wemos D1-32 mini for backwards compatabilty
#define EMSUART_TXPIN 16 // 16 is UART2 TX. Use 5 for D8 on a Wemos D1-32 mini for backwards compatabilty
#endif
namespace emsesp {

57
src/uart/emsuart_esp8266.cpp
View File

@@ -32,38 +32,21 @@ uint8_t emsRxBufIdx = 0;
uint8_t phantomBreak = 0;
uint8_t tx_mode_ = 0xFF;
bool drop_next_rx = true;
uint32_t emsRxTime;
#define EMS_RX_TO_TX_TIMEOUT 20
//
// Main interrupt handler
// Important: must not use ICACHE_FLASH_ATTR
//
void ICACHE_RAM_ATTR EMSuart::emsuart_rx_intr_handler(void * para) {
// static bool rx_idle_ = true;
static uint8_t length = 0;
static uint8_t uart_buffer[EMS_MAXBUFFERSIZE + 2];
/*
// is a new buffer? if so init the thing for a new telegram
if (rx_idle_) {
rx_idle_ = false; // status set to busy
if (USIS(EMSUART_UART) & ((1 << UIBD))) { // BREAK detection = End of EMS data block
length = 0;
}
// fill IRQ buffer, by emptying Rx FIFO
if (USIS(EMSUART_UART) & ((1 << UIFF) | (1 << UITO) | (1 << UIBD))) {
while ((USS(EMSUART_UART) >> USRXC) & 0xFF) {
uint8_t rx = USF(EMSUART_UART);
if (length < EMS_MAXBUFFERSIZE)
uart_buffer[length++] = rx;
}
// clear Rx FIFO full and Rx FIFO timeout interrupts
USIC(EMSUART_UART) = (1 << UIFF) | (1 << UITO);
}
*/
// BREAK detection = End of EMS data block
if (USIS(EMSUART_UART) & ((1 << UIBD))) {
length = 0;
while ((USS(EMSUART_UART) >> USRXC) & 0xFF) {
while ((USS(EMSUART_UART) >> USRXC) & 0xFF) { // read fifo into buffer
uint8_t rx = USF(EMSUART_UART);
if (length < EMS_MAXBUFFERSIZE) {
uart_buffer[length++] = rx;
@@ -71,17 +54,14 @@ void ICACHE_RAM_ATTR EMSuart::emsuart_rx_intr_handler(void * para) {
drop_next_rx = true;
}
}
ETS_UART_INTR_DISABLE(); // disable all interrupts and clear them
USIC(EMSUART_UART) = (1 << UIBD); // INT clear the BREAK detect interrupt
USC0(EMSUART_UART) &= ~(1 << UCBRK); // reset tx-brk
if (!drop_next_rx) {
pEMSRxBuf->length = length;
os_memcpy((void *)pEMSRxBuf->buffer, (void *)&uart_buffer, pEMSRxBuf->length); // copy data into transfer buffer, including the BRK 0x00 at the end
// rx_idle_ = true; // check set the status flag stating BRK has been received and we can start a new package
emsRxTime = millis();
}
drop_next_rx = false;
ETS_UART_INTR_ENABLE(); // re-enable UART interrupts
system_os_post(EMSUART_recvTaskPrio, 0, 0); // call emsuart_recvTask() at next opportunity
}
}
@@ -211,7 +191,6 @@ void ICACHE_FLASH_ATTR EMSuart::restart() {
drop_next_rx = true;
}
ETS_UART_INTR_ENABLE();
// emsuart_flush_fifos();
}
/*
@@ -248,6 +227,7 @@ void ICACHE_FLASH_ATTR EMSuart::tx_brk() {
* It's a bit dirty. there is no special wait logic per tx_mode type, fifo flushes or error checking
*/
void EMSuart::send_poll(uint8_t data) {
noInterrupts();
if (tx_mode_ == EMS_TXMODE_NEW) {
USC0(EMSUART_UART) &= ~(1 << UCBRK); // reset tx-brk
USF(EMSUART_UART) = data;
@@ -257,6 +237,7 @@ void EMSuart::send_poll(uint8_t data) {
delayMicroseconds(EMSUART_TX_BRK_WAIT);
tx_brk(); // send <BRK>
}
interrupts();
}
/*
@@ -268,29 +249,37 @@ EMSUART_STATUS ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
if (len == 0) {
return EMS_TX_STATUS_OK; // nothing to send
}
if(millis() > (emsRxTime + EMS_RX_TO_TX_TIMEOUT)) { // send allowed within 20 ms
return EMS_TX_WTD_TIMEOUT;
}
// new code from Michael. See https://github.com/proddy/EMS-ESP/issues/380
if (tx_mode_ == EMS_TXMODE_NEW) {
USC0(EMSUART_UART) &= ~(1 << UCBRK); // reset tx-brk
noInterrupts();
for (uint8_t i = 0; i < len; i++) {
USF(EMSUART_UART) = buf[i];
}
USC0(EMSUART_UART) |= (1 << UCBRK); // send <BRK> at the end
interrupts();
return EMS_TX_STATUS_OK;
}
// EMS+ https://github.com/proddy/EMS-ESP/issues/23#
if (tx_mode_ == EMS_TXMODE_EMSPLUS) { // With extra tx delay for EMS+
noInterrupts();
for (uint8_t i = 0; i < len; i++) {
USF(EMSUART_UART) = buf[i];
delayMicroseconds(EMSUART_TX_BRK_WAIT); // 2070
}
tx_brk(); // send <BRK>
interrupts();
return EMS_TX_STATUS_OK;
}
// Junkers logic by @philrich
if (tx_mode_ == EMS_TXMODE_HT3) {
noInterrupts();
for (uint8_t i = 0; i < len; i++) {
USF(EMSUART_UART) = buf[i];
@@ -302,6 +291,7 @@ EMSUART_STATUS ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
delayMicroseconds(EMSUART_TX_WAIT_BYTE - EMSUART_TX_LAG + EMSUART_TX_WAIT_GAP); // 1760
}
tx_brk(); // send <BRK>
interrupts();
return EMS_TX_STATUS_OK;
}
@@ -334,8 +324,8 @@ EMSUART_STATUS ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
// disable rx interrupt
// clear Rx status register, resetting the Rx FIFO and flush it
ETS_UART_INTR_DISABLE();
USC0(EMSUART_UART) |= (1 << UCRXRST);
noInterrupts();
//ETS_UART_INTR_DISABLE();
emsuart_flush_fifos();
// send the bytes along the serial line
@@ -347,12 +337,14 @@ EMSUART_STATUS ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
while (((USS(EMSUART_UART) >> USRXC) & 0xFF) == _usrxc) {
delayMicroseconds(EMSUART_BUSY_WAIT); // burn CPU cycles...
if (--wdc == 0) {
ETS_UART_INTR_ENABLE();
interrupts();
//ETS_UART_INTR_ENABLE();
return EMS_TX_WTD_TIMEOUT;
}
if (USIR(EMSUART_UART) & (1 << UIBD)) {
USIC(EMSUART_UART) = (1 << UIBD); // clear BRK detect IRQ
ETS_UART_INTR_ENABLE();
interrupts();
//ETS_UART_INTR_ENABLE();
return EMS_TX_BRK_DETECT;
}
}
@@ -379,7 +371,8 @@ EMSUART_STATUS ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
}
}
ETS_UART_INTR_ENABLE(); // open up the FIFO again to start receiving
interrupts();
//ETS_UART_INTR_ENABLE(); // open up the FIFO again to start receiving
return result; // send the Tx status back
}