target/ast1060-evb/i2c-slave/system.json5

// Licensed under the Apache-2.0 license

// AST1060-EVB I2C Slave Echo System Configuration
//
// Memory Layout:
//   0x00000000 - 0x000004A0: Vector table + kernel annotations
//   0x000004A0 - 0x00020000: Kernel code (~126KB)
//   0x00020000 - 0x00040000: i2c_server flash (128KB)
//   0x00040000 - 0x00050000: i2c_slave_echo flash (64KB)
//   0x00060000 - 0x00080000: Kernel RAM (128KB)
//   0x00080000 - 0x00090000: i2c_server RAM (64KB)
//   0x00090000 - 0x00098000: i2c_slave_echo RAM (32KB)
{
    arch: {
        type: "armv7m",
        vector_table_start_address: 0x00000000,
        vector_table_size_bytes: 1664,  // 0x680 (includes vector table + annotations)
    },
    kernel: {
        flash_start_address: 0x00000680,
        flash_size_bytes: 129408,
        ram_start_address: 0x00060000,
        ram_size_bytes: 131072,
    },
    apps: [
        // ──── I2C Server ────
        {
            name: "i2c_server",
            flash_size_bytes: 131072,
            ram_size_bytes: 65536,
            process: {
                name: "i2c server process",
                objects: [
                    {
                        name: "I2C",
                        type: "channel_handler",
                    },
                    {
                        // AST1060 I2C2 combined master+slave interrupt.
                        // IRQ number confirmed from ast1060-pac: Interrupt::i2c2 = 112.
                        // No separate slave-RX line exists; the server reads i2cs24
                        // (slave status register) to distinguish event types.
                        name: "I2C2_IRQ",
                        type: "interrupt",
                        irqs: [
                            {
                                name: "i2c2",
                                number: 112,
                            },
                        ],
                    },
                    {
                        // WaitGroup: multiplexes IPC channel (READABLE) and IRQ (signals::I2C2).
                        name: "WG",
                        type: "wait_group",
                    },
                ],
                memory_mappings: [
                    {
                        // AST1060 I2C peripheral block: I2cglobal through I2cFilter
                        // Base: 0x7e7b0000, covers all 14 controllers + buffers + filter
                        name: "i2c_regs",
                        type: "device",
                        start_address: 0x7e7b0000,
                        size_bytes: 0x4000,
                    },
                    {
                        name: "scu",
                        type: "device",
                        start_address: 0x7e6e2000,
                        size_bytes: 0x1000,  // SCU register block (scu310 at +0x310 read for APB clock)
                    },
                ],
                threads: [
                    {
                        name: "i2c server thread",
                        stack_size_bytes: 4096,
                    },
                ],
            },
        },
        // ──── I2C Slave Echo ────
        {
            name: "i2c_slave_echo",
            flash_size_bytes: 65536,
            ram_size_bytes: 32768,
            process: {
                name: "i2c slave echo process",
                objects: [
                    {
                        name: "I2C",
                        type: "channel_initiator",
                        handler_app: "i2c_server",
                        handler_object_name: "I2C",
                    },
                ],
                threads: [
                    {
                        name: "i2c slave echo thread",
                        stack_size_bytes: 2048,
                    },
                ],
            },
        },
    ],
}