Mplab C30 Compiler -

A for C30 would address its most common real-world pain points: poor RAM banking management , lack of built-in circular buffer support for DSP , and verbose ISR syntax .

int main() init_uart_buffer(); unsigned char ch; while (1) if (c30_cbuf_get(&uart_rx, &ch) == 0) // process byte

// ------------------------------------------------------------ // 1. SAFE BANKING MACROS (avoid manual BANKED/FAR typos) // ------------------------------------------------------------ #define BANKED_NEAR ((near)) // Accessible without PSV #define BANKED_FAR attribute ((far)) // Any RAM, slower access #define Y_DATA_SPACE attribute ((space(ymemory))) // For DSP #define AUTO_PSV attribute ((space(auto_psv))) // const in program memory mplab c30 compiler

cb->buffer[cb->head] = data; cb->head = next_head; return 0;

// Usage: INTERRUPT(_U1RXInterrupt, 6) /* code */ A for C30 would address its most common

// Interrupt-safe put (disables interrupts) inline int c30_cbuf_put(c30_cbuf_t *cb, unsigned char data) unsigned int next_head = (cb->head + 1) & cb->mask; if (next_head == cb->tail) return -1; // full

INTERRUPT(_U1RXInterrupt, 6) while (U1STAbits.URXDA) c30_cbuf_put(&uart_rx, U1RXREG); unsigned char ch

// Initialize (buffer must be 2^N, ideally in Y data space) void c30_cbuf_init(c30_cbuf_t *cb, unsigned char *buf, unsigned int size) cb->head = 0; cb->tail = 0; cb->mask = size - 1; cb->buffer = buf; cb->len = size;