Merge pull request #4224 from microDev1/busio-uart-rp

RP2040: Support for UART

Author: tannewt

locale/circuitpython.pot

@@ -333,6 +333,7 @@ msgid "All SPI peripherals are in use"
 msgstr ""
 
 #: ports/esp32s2/common-hal/busio/UART.c ports/nrf/common-hal/busio/UART.c
+#: ports/raspberrypi/common-hal/busio/UART.c
 msgid "All UART peripherals are in use"
 msgstr ""
 
@@ -952,6 +953,7 @@ msgid "Failed to acquire mutex, err 0x%04x"
 msgstr ""
 
 #: ports/mimxrt10xx/common-hal/busio/UART.c ports/nrf/common-hal/busio/UART.c
+#: ports/raspberrypi/common-hal/busio/UART.c
 msgid "Failed to allocate RX buffer"
 msgstr ""
 
@@ -1219,7 +1221,8 @@ msgstr ""
 msgid "Invalid bits per value"
 msgstr ""
 
-#: ports/nrf/common-hal/busio/UART.c ports/stm/common-hal/busio/UART.c
+#: ports/nrf/common-hal/busio/UART.c ports/raspberrypi/common-hal/busio/UART.c
+#: ports/stm/common-hal/busio/UART.c
 msgid "Invalid buffer size"
 msgstr ""
 
@@ -1294,10 +1297,10 @@ msgstr ""
 #: ports/esp32s2/common-hal/busio/I2C.c ports/esp32s2/common-hal/busio/SPI.c
 #: ports/esp32s2/common-hal/busio/UART.c ports/esp32s2/common-hal/canio/CAN.c
 #: ports/mimxrt10xx/common-hal/busio/I2C.c
-#: ports/mimxrt10xx/common-hal/busio/SPI.c
-#: ports/mimxrt10xx/common-hal/busio/UART.c ports/nrf/common-hal/busio/I2C.c
+#: ports/mimxrt10xx/common-hal/busio/SPI.c ports/nrf/common-hal/busio/I2C.c
 #: ports/raspberrypi/common-hal/busio/I2C.c
 #: ports/raspberrypi/common-hal/busio/SPI.c
+#: ports/raspberrypi/common-hal/busio/UART.c
 msgid "Invalid pins"
 msgstr ""
 
@@ -1346,7 +1349,8 @@ msgstr ""
 msgid "Invalid wave file"
 msgstr ""
 
-#: ports/stm/common-hal/busio/UART.c
+#: ports/mimxrt10xx/common-hal/busio/UART.c ports/nrf/common-hal/busio/UART.c
+#: ports/raspberrypi/common-hal/busio/UART.c ports/stm/common-hal/busio/UART.c
 msgid "Invalid word/bit length"
 msgstr ""
 
@@ -1846,7 +1850,7 @@ msgstr ""
 msgid "RNG Init Error"
 msgstr ""
 
-#: ports/nrf/common-hal/busio/UART.c
+#: ports/nrf/common-hal/busio/UART.c ports/raspberrypi/common-hal/busio/UART.c
 msgid "RS485 Not yet supported on this device"
 msgstr ""
 
@@ -2156,10 +2160,6 @@ msgstr ""
 msgid "UART Re-init error"
 msgstr ""
 
-#: ports/raspberrypi/common-hal/busio/UART.c
-msgid "UART not yet supported"
-msgstr ""
-
 #: ports/stm/common-hal/busio/UART.c
 msgid "UART write error"
 msgstr ""
@@ -2488,7 +2488,7 @@ msgid "binary op %q not implemented"
 msgstr ""
 
 #: shared-bindings/busio/UART.c
-msgid "bits must be 7, 8 or 9"
+msgid "bits must be in range 5 to 9"
 msgstr ""
 
 #: shared-bindings/audiomixer/Mixer.c

ports/atmel-samd/boards/catwan_usbstick/mpconfigboard.mk

@@ -11,3 +11,5 @@ LONGINT_IMPL = NONE
 CIRCUITPY_FULL_BUILD = 0
 CIRCUITPY_COUNTIO = 0
 CIRCUITPY_ROTARYIO = 0
+
+SUPEROPT_GC = 0

ports/mimxrt10xx/common-hal/busio/UART.c

@@ -93,6 +93,10 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
     self->character_bits = bits;
     self->timeout_ms = timeout * 1000;
 
+    if (self->character_bits != 7 && self->character_bits != 8) {
+        mp_raise_ValueError(translate("Invalid word/bit length"));
+    }
+
     // We are transmitting one direction if one pin is NULL and the other isn't.
     bool is_onedirection = (rx == NULL) != (tx == NULL);
     bool uart_taken = false;
@@ -154,10 +158,6 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
         mp_raise_ValueError(translate("Hardware in use, try alternative pins"));
     }
 
-    if(self->rx == NULL && self->tx == NULL) {
-        mp_raise_ValueError(translate("Invalid pins"));
-    }
-
     if (is_onedirection && ((rts != NULL) || (cts != NULL))) {
         mp_raise_ValueError(translate("Both RX and TX required for flow control"));
     }

ports/nrf/common-hal/busio/UART.c

@@ -70,9 +70,9 @@ static uint32_t get_nrf_baud (uint32_t baudrate) {
         { 14400, NRF_UARTE_BAUDRATE_14400 },
         { 19200, NRF_UARTE_BAUDRATE_19200 },
         { 28800, NRF_UARTE_BAUDRATE_28800 },
-	{ 31250, NRF_UARTE_BAUDRATE_31250 },
+	    { 31250, NRF_UARTE_BAUDRATE_31250 },
         { 38400, NRF_UARTE_BAUDRATE_38400 },
-	{ 56000, NRF_UARTE_BAUDRATE_56000 },
+	    { 56000, NRF_UARTE_BAUDRATE_56000 },
         { 57600, NRF_UARTE_BAUDRATE_57600 },
         { 76800, NRF_UARTE_BAUDRATE_76800 },
         { 115200, NRF_UARTE_BAUDRATE_115200 },
@@ -144,6 +144,10 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
     mp_float_t timeout, uint16_t receiver_buffer_size, byte* receiver_buffer,
     bool sigint_enabled) {
 
+    if (bits != 8) {
+        mp_raise_ValueError(translate("Invalid word/bit length"));
+    }
+
     if ((rs485_dir != NULL) || (rs485_invert)) {
         mp_raise_ValueError(translate("RS485 Not yet supported on this device"));
     }