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Paul
2019-12-30 14:47:23 +01:00
parent f0c7b954a5
commit b64c35732e
2 changed files with 22 additions and 22 deletions
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42
src/emsuart.cpp
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@@ -224,27 +224,27 @@ _EMS_TX_STATUS ICACHE_FLASH_ATTR emsuart_tx_buffer(uint8_t * buf, uint8_t len) {
}
emsuart_tx_brk(); // send <BRK>
} else if (EMS_Sys_Status.emsTxMode == EMS_TXMODE_DEFAULT) {
/*
* based on code from https://github.com/proddy/EMS-ESP/issues/103 by @susisstrolch
* we emit the whole telegram, with Rx interrupt disabled, collecting busmaster response in FIFO.
* after sending the last char we poll the Rx status until either
* - size(Rx FIFO) == size(Tx-Telegram)
* - <BRK> is detected
* At end of receive we re-enable Rx-INT and send a Tx-BRK in loopback mode.
*
* EMS-Bus error handling
* 1. Busmaster stops echoing on Tx w/o permission
* 2. Busmaster cancel telegram by sending a BRK
*
* Case 1. is handled by a watchdog counter which is reset on each
* Tx attempt. The timeout should be 20x EMSUART_BIT_TIME plus
* some smart guess for processing time on targeted EMS device.
* We set EMS_Sys_Status.emsTxStatus to EMS_TX_WTD_TIMEOUT and return
*
* Case 2. is handled via a BRK chk during transmission.
* We set EMS_Sys_Status.emsTxStatus to EMS_TX_BRK_DETECT and return
*
*/
/*
* based on code from https://github.com/proddy/EMS-ESP/issues/103 by @susisstrolch
* we emit the whole telegram, with Rx interrupt disabled, collecting busmaster response in FIFO.
* after sending the last char we poll the Rx status until either
* - size(Rx FIFO) == size(Tx-Telegram)
* - <BRK> is detected
* At end of receive we re-enable Rx-INT and send a Tx-BRK in loopback mode.
*
* EMS-Bus error handling
* 1. Busmaster stops echoing on Tx w/o permission
* 2. Busmaster cancel telegram by sending a BRK
*
* Case 1. is handled by a watchdog counter which is reset on each
* Tx attempt. The timeout should be 20x EMSUART_BIT_TIME plus
* some smart guess for processing time on targeted EMS device.
* We set EMS_Sys_Status.emsTxStatus to EMS_TX_WTD_TIMEOUT and return
*
* Case 2. is handled via a BRK chk during transmission.
* We set EMS_Sys_Status.emsTxStatus to EMS_TX_BRK_DETECT and return
*
*/
uint16_t wdc = EMS_TX_TO_COUNT;
ETS_UART_INTR_DISABLE(); // disable rx interrupt