added IRQManager class to dynamically handle irq vector table (at the present just works for uart and in a simplified way, because it does not touch other interrupts automatically generated by e2studio)

Author: maidnl

cores/arduino/IRQManager.cpp

@@ -0,0 +1,72 @@
+#include "IRQManager.h"
+#include "bsp_api.h"
+
+#define FIXED_IRQ_NUM   16
+#define PROG_IRQ_NUM    32
+
+#define UART_SCI2_REQ_NUM   4
+#define UART_SCI2_PRIORITY 12
+
+IRQManager::IRQManager() : last_interrupt_index{-1} {
+
+}
+
+IRQManager::~IRQManager() {
+
+}
+
+IRQManager& IRQManager::getInstance() {
+    static IRQManager    instance;
+    return instance;
+}
+
+
+bool IRQManager::addPeripheral(Peripheral_t p, uart_cfg_t &cfg) {
+    /* getting the address of the current location of the irq vector table */
+    volatile uint32_t *irq_ptr = (volatile uint32_t *)SCB->VTOR;
+    /* set the displacement to the "programmable" part of the table */
+    irq_ptr += FIXED_IRQ_NUM;
+    
+
+    if(p == UART_SCI2) {
+        if( (last_interrupt_index +  UART_SCI2_REQ_NUM) < PROG_IRQ_NUM ) {
+            /* TX interrupt */
+            last_interrupt_index = 26;
+            cfg.txi_ipl = UART_SCI2_PRIORITY;
+            cfg.txi_irq = (IRQn_Type)last_interrupt_index;
+            *(irq_ptr + last_interrupt_index) = (uint32_t)sci_uart_txi_isr;
+            R_ICU->IELSR[last_interrupt_index] = BSP_PRV_IELS_ENUM(EVENT_SCI2_TXI);
+            
+            /* TX-ERROR interrupt */
+            last_interrupt_index++;
+            cfg.tei_ipl = UART_SCI2_PRIORITY;
+            cfg.tei_irq = (IRQn_Type)last_interrupt_index;
+            *(irq_ptr + last_interrupt_index) = (uint32_t)sci_uart_tei_isr;
+            R_ICU->IELSR[last_interrupt_index] = BSP_PRV_IELS_ENUM(EVENT_SCI2_TEI);
+            
+            /* RX interrupt */
+            last_interrupt_index++;
+            cfg.rxi_ipl = UART_SCI2_PRIORITY;
+            cfg.rxi_irq = (IRQn_Type)last_interrupt_index;
+            *(irq_ptr + last_interrupt_index) = (uint32_t)sci_uart_rxi_isr;
+            R_ICU->IELSR[last_interrupt_index] = BSP_PRV_IELS_ENUM(EVENT_SCI2_RXI);
+            
+            /* RX-ERROR interrupt */
+            last_interrupt_index++;
+            cfg.eri_ipl = UART_SCI2_PRIORITY;
+            cfg.eri_irq = (IRQn_Type)last_interrupt_index;
+            *(irq_ptr + last_interrupt_index) = (uint32_t)sci_uart_eri_isr;
+            R_ICU->IELSR[last_interrupt_index] = BSP_PRV_IELS_ENUM(EVENT_SCI2_ERI);
+        }
+        else {
+            return false;
+        }
+    }
+    else {
+        return false;
+    }
+}
+
+/* Do not build these data structures if no interrupts are currently allocated because IAR will have build errors. */
+
+

cores/arduino/IRQManager.h

@@ -0,0 +1,33 @@
+#ifndef ARDUINO_IRQ_MANAGER_H
+#define ARDUINO_IRQ_MANAGER_H
+
+#include "bsp_api.h"
+#include "r_uart_api.h"
+
+typedef enum {
+    RTC,
+    UART_SCI2,
+    I2C_MASTER,
+    I2C_SLAVE
+} Peripheral_t;
+
+
+class IRQManager {
+    public:
+    bool addPeripheral(Peripheral_t p, uart_cfg_t &cfg);
+    static IRQManager& getInstance();
+    IRQManager(IRQManager const&)               = delete;
+    void operator=(IRQManager const&)           = delete;
+    ~IRQManager();
+
+    private:
+    int last_interrupt_index;
+    IRQManager();
+
+};
+
+
+
+
+
+#endif