KL27Z: Fix serial IRQ handling

Filip Jagodzinski · Filip Jagodzinski · commit 3119d69f0e7c · 2019-06-07T16:46:53.000+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_KL27Z/serial_api.c b/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL27Z/serial_api.c
@@ -135,10 +135,10 @@ 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
`@@ -135,10 +135,10 @@ static inline void uart_irq(uint32_t transmit_empty, uint32_t receive_full, uint`
`135`	`135`	`}`
`136`	`136`
`137`	`137`	`if (serial_irq_ids[index] != 0) {`
`138`		`- if (transmit_empty)`
	`138`	`+ if (transmit_empty && (LPUART_GetEnabledInterrupts(uart_addrs[index]) & kLPUART_TxDataRegEmptyInterruptEnable))`
`139`	`139`	`irq_handler(serial_irq_ids[index], TxIrq);`
`140`	`140`
`141`		`- if (receive_full)`
	`141`	`+ if (receive_full && (LPUART_GetEnabledInterrupts(uart_addrs[index]) & kLPUART_RxDataRegFullInterruptEnable))`
`142`	`142`	`irq_handler(serial_irq_ids[index], RxIrq);`
`143`	`143`	`}`
`144`	`144`	`}`