Return bytes written from RP2040 UART.write()
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@ -191,12 +191,13 @@ size_t common_hal_busio_uart_write(busio_uart_obj_t *self, const uint8_t *data,
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mp_raise_ValueError(translate("No TX pin"));
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}
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while (len > 0) {
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while (uart_is_writable(self->uart) && len > 0) {
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size_t left_to_write = len;
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while (left_to_write > 0) {
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while (uart_is_writable(self->uart) && left_to_write > 0) {
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// Write and advance.
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uart_get_hw(self->uart)->dr = *data++;
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// Decrease how many chars left to write.
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len--;
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left_to_write--;
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}
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RUN_BACKGROUND_TASKS;
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}
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