KW41Z: Fix serial IRQ handling

Filip Jagodzinski · Filip Jagodzinski · commit 96b6cd3ee65e · 2019-06-07T16:33:42.000+02:00
Check that the RX or TX interrupt is enabled before calling
a registered handler with RxIrq or TxIrq arg.
diff --git a/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KW41Z/serial_api.c b/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KW41Z/serial_api.c
@@ -131,10 +131,10 @@ static inline void uart_irq(uint32_t transmit_empty, uint32_t receive_full, uint
     }
 
     if (serial_irq_ids[index] != 0) {
-        if (transmit_empty)
+        if (transmit_empty && (LPUART_GetEnabledInterrupts(uart_addrs[index]) & kLPUART_TxDataRegEmptyInterruptEnable))
             irq_handler(serial_irq_ids[index], TxIrq);
 
-        if (receive_full)
+        if (receive_full && (LPUART_GetEnabledInterrupts(uart_addrs[index]) & kLPUART_RxDataRegFullInterruptEnable))
             irq_handler(serial_irq_ids[index], RxIrq);
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -131,10 +131,10 @@ static inline void uart_irq(uint32_t transmit_empty, uint32_t receive_full, uint`
`131`	`131`	`}`
`132`	`132`
`133`	`133`	`if (serial_irq_ids[index] != 0) {`
`134`		`- if (transmit_empty)`
	`134`	`+ if (transmit_empty && (LPUART_GetEnabledInterrupts(uart_addrs[index]) & kLPUART_TxDataRegEmptyInterruptEnable))`
`135`	`135`	`irq_handler(serial_irq_ids[index], TxIrq);`
`136`	`136`
`137`		`- if (receive_full)`
	`137`	`+ if (receive_full && (LPUART_GetEnabledInterrupts(uart_addrs[index]) & kLPUART_RxDataRegFullInterruptEnable))`
`138`	`138`	`irq_handler(serial_irq_ids[index], RxIrq);`
`139`	`139`	`}`
`140`	`140`	`}`