Core/IRQManager: Add support for I2S.

Author: facchinm

cores/arduino/IRQManager.cpp

@@ -23,6 +23,7 @@
 #define ADC_PRIORITY               12
 #define CAN_PRIORITY               12
 #define CANFD_PRIORITY             12
+#define I2S_PRIORITY               12
 #define FIRST_INT_SLOT_FREE         0
 
 IRQManager::IRQManager() : last_interrupt_index{0} {
@@ -1006,6 +1007,41 @@ bool IRQManager::addPeripheral(Peripheral_t p, void *cfg) {
         }
     }
 #endif
+
+#if I2S_HOWMANY > 0
+    /* **********************************************************************
+                                    I2S
+       ********************************************************************** */
+    else if(p == IRQ_I2S && cfg != NULL) {
+        i2s_cfg_t *i2s_cfg = (i2s_cfg_t *)cfg;
+
+        if(i2s_cfg->txi_irq == FSP_INVALID_VECTOR) {
+            i2s_cfg->txi_irq = (IRQn_Type)last_interrupt_index;
+            i2s_cfg->txi_ipl = I2S_PRIORITY;
+            *(irq_ptr + last_interrupt_index) = (uint32_t)ssi_txi_isr;
+            R_ICU->IELSR[last_interrupt_index] = BSP_PRV_IELS_ENUM(EVENT_SSI0_TXI);
+            R_FSP_IsrContextSet(i2s_cfg->txi_irq, (void*)i2s_cfg->p_context);
+            last_interrupt_index++;
+        }
+        if(i2s_cfg->rxi_irq == FSP_INVALID_VECTOR) {
+            i2s_cfg->rxi_irq = (IRQn_Type)last_interrupt_index;
+            i2s_cfg->rxi_ipl = I2S_PRIORITY;
+            *(irq_ptr + last_interrupt_index) = (uint32_t)ssi_rxi_isr;
+            R_ICU->IELSR[last_interrupt_index] = BSP_PRV_IELS_ENUM(EVENT_SSI0_RXI);
+            R_FSP_IsrContextSet(i2s_cfg->rxi_irq, (void*)i2s_cfg->p_context);
+            last_interrupt_index++;
+        }
+        if(i2s_cfg->int_irq == FSP_INVALID_VECTOR) {
+            i2s_cfg->int_irq = (IRQn_Type)last_interrupt_index;
+            i2s_cfg->idle_err_ipl = I2S_PRIORITY;
+            *(irq_ptr + last_interrupt_index) = (uint32_t)ssi_int_isr;
+            R_ICU->IELSR[last_interrupt_index] = BSP_PRV_IELS_ENUM(EVENT_SSI0_INT);
+            R_FSP_IsrContextSet(i2s_cfg->int_irq, (void*)i2s_cfg->p_context);
+            last_interrupt_index++;
+        }
+    }
+#endif
+
     else {
         rv = false;
     }

cores/arduino/IRQManager.h

@@ -19,6 +19,15 @@
 #include "r_external_irq_api.h"
 #endif
 
+#if I2S_HOWMANY > 0
+#include "r_ssi.h"
+extern "C" {
+void ssi_txi_isr(void);
+void ssi_rxi_isr(void);
+void ssi_int_isr(void);
+}
+#endif
+
 #include "r_timer_api.h"
 
 #ifdef ELC_EVENT_DMAC0_INT
@@ -44,7 +53,8 @@ typedef enum {
     IRQ_CAN,
     IRQ_ETHERNET,
     IRQ_CANFD,
-    IRQ_SDCARD
+    IRQ_SDCARD,
+    IRQ_I2S
 } Peripheral_t;
 
 #if SDCARD_HOWMANY > 0

variants/PORTENTA_C33/pins_arduino.h

@@ -161,6 +161,7 @@ static const uint8_t SS  =  PIN_SPI_CS;
 /****** SDCARD CORE DEFINES *******/
 #define SDCARD_HOWMANY     1
 
+#define I2S_HOWMANY        1
 
 #define EXT_INTERRUPTS_HOWMANY 8