diff --git a/src/devices.rs b/src/devices.rs
new file mode 100644
index 0000000..137c059
--- /dev/null
+++ b/src/devices.rs
@@ -0,0 +1,292 @@
+const DEVICE_NB: usize = 42;
+
+pub enum Device {
+    Pmu,
+    Radio,
+    Uart,
+    Spi,
+    Nfct,
+    GpioTE,
+    Saadc,
+    Timer,
+    Rtc,
+    Temp,
+    Rng,
+    Ecb,
+    Ccm,
+    Wdt,
+    Qdec,
+    Comp,
+    Egu,
+    Pwm,
+    Pdm,
+    Nvmc,
+    Ppi,
+    Mwu,
+    I2s,
+    Fpu,
+    Gpio,
+    Ficr,
+    Uicr,
+}
+
+pub struct MappedDevice {
+    device: Device,
+    address: usize,
+    size: usize,
+}
+
+const DEVICES: [MappedDevice; DEVICE_NB] = [
+    /* Power Monitoring Unit */
+    MappedDevice {
+        device: Device::Pmu,
+        address: 0x4000000,
+        size: 0x1000,
+    },
+    /* 2.4 GHz Radio */
+    MappedDevice {
+        device: Device::Radio,
+        address: 0x40001000,
+        size: 0x1000,
+    },
+    /* UART 0 */
+    MappedDevice {
+        device: Device::Uart,
+        address: 0x40002000,
+        size: 0x1000,
+    },
+    /* SPI 0 */
+    MappedDevice {
+        device: Device::Spi,
+        address: 0x40003000,
+        size: 0x1000,
+    },
+    /* SPI 1 */
+    MappedDevice {
+        device: Device::Spi,
+        address: 0x40004000,
+        size: 0x1000,
+    },
+    /* Near-Field Communication Tag */
+    MappedDevice {
+        device: Device::Nfct,
+        address: 0x40005000,
+        size: 0x1000,
+    },
+    /* GPIO Tasks and Events */
+    MappedDevice {
+        device: Device::GpioTE,
+        address: 0x40006000,
+        size: 0x1000,
+    },
+    /* Analog to digital converter */
+    MappedDevice {
+        device: Device::Saadc,
+        address: 0x40007000,
+        size: 0x1000,
+    },
+    /* Timer 0 */
+    MappedDevice {
+        device: Device::Timer,
+        address: 0x40008000,
+        size: 0x1000,
+    },
+    /* Timer 1 */
+    MappedDevice {
+        device: Device::Timer,
+        address: 0x40009000,
+        size: 0x1000,
+    },
+    /* Timer 2 */
+    MappedDevice {
+        device: Device::Timer,
+        address: 0x4000a000,
+        size: 0x1000,
+    },
+    /* RTC 0 */
+    MappedDevice {
+        device: Device::Rtc,
+        address: 0x4000b000,
+        size: 0x1000,
+    },
+    /* Temperature sensor */
+    MappedDevice {
+        device: Device::Temp,
+        address: 0x4000c000,
+        size: 0x1000,
+    },
+    /* Random Number Generator */
+    MappedDevice {
+        device: Device::Rng,
+        address: 0x4000d000,
+        size: 0x1000,
+    },
+    /* AES Electronic Code Book */
+    MappedDevice {
+        device: Device::Ecb,
+        address: 0x4000e000,
+        size: 0x1000,
+    },
+    /* AES CCM Mode Encryption */
+    MappedDevice {
+        device: Device::Ccm,
+        address: 0x4000f000,
+        size: 0x1000,
+    },
+    /* Watchdog Timer */
+    MappedDevice {
+        device: Device::Wdt,
+        address: 0x40010000,
+        size: 0x1000,
+    },
+    /* RTC 1 */
+    MappedDevice {
+        device: Device::Rtc,
+        address: 0x40011000,
+        size: 0x1000,
+    },
+    /* Quadrature Decoder */
+    MappedDevice {
+        device: Device::Qdec,
+        address: 0x40012000,
+        size: 0x1000,
+    },
+    /* General Purpose Comparator */
+    MappedDevice {
+        device: Device::Comp,
+        address: 0x40013000,
+        size: 0x1000,
+    },
+    /* Event Generator Unit 0 */
+    MappedDevice {
+        device: Device::Egu,
+        address: 0x40014000,
+        size: 0x1000,
+    },
+    /* Event Generator Unit 1 */
+    MappedDevice {
+        device: Device::Egu,
+        address: 0x40015000,
+        size: 0x1000,
+    },
+    /* Event Generator Unit 2 */
+    MappedDevice {
+        device: Device::Egu,
+        address: 0x40016000,
+        size: 0x1000,
+    },
+    /* Event Generator Unit 3 */
+    MappedDevice {
+        device: Device::Egu,
+        address: 0x40017000,
+        size: 0x1000,
+    },
+    /* Event Generator Unit 4 */
+    MappedDevice {
+        device: Device::Egu,
+        address: 0x40018000,
+        size: 0x1000,
+    },
+    /* Event Generator Unit 5 */
+    MappedDevice {
+        device: Device::Egu,
+        address: 0x40019000,
+        size: 0x1000,
+    },
+    /* Timer 3 */
+    MappedDevice {
+        device: Device::Timer,
+        address: 0x4001a000,
+        size: 0x1000,
+    },
+    /* Timer 4 */
+    MappedDevice {
+        device: Device::Timer,
+        address: 0x4001b000,
+        size: 0x1000,
+    },
+    /* Pulse Width Modulation Unit 0 */
+    MappedDevice {
+        device: Device::Pwm,
+        address: 0x4001c000,
+        size: 0x1000,
+    },
+    /* Pulse Density Modulation */
+    MappedDevice {
+        device: Device::Pdm,
+        address: 0x4001d000,
+        size: 0x1000,
+    },
+    /* Non-Volatile Memory Controller */
+    MappedDevice {
+        device: Device::Nvmc,
+        address: 0x4001e000,
+        size: 0x1000,
+    },
+    /* Programmable Peripheral Interconnect */
+    MappedDevice {
+        device: Device::Ppi,
+        address: 0x4001f000,
+        size: 0x1000,
+    },
+    /* Memory Watch Unit */
+    MappedDevice {
+        device: Device::Mwu,
+        address: 0x40020000,
+        size: 0x1000,
+    },
+    /* Pulse Width Modulation Unit 1 */
+    MappedDevice {
+        device: Device::Pwm,
+        address: 0x40021000,
+        size: 0x1000,
+    },
+    /* Pulse Width Modulation Unit 2 */
+    MappedDevice {
+        device: Device::Pwm,
+        address: 0x40022000,
+        size: 0x1000,
+    },
+    /* SPI 2 */
+    MappedDevice {
+        device: Device::Spi,
+        address: 0x40023000,
+        size: 0x1000,
+    },
+    /* RTC 2 */
+    MappedDevice {
+        device: Device::Rtc,
+        address: 0x40024000,
+        size: 0x1000,
+    },
+    /* Inter-IC Sound Interface */
+    MappedDevice {
+        device: Device::I2s,
+        address: 0x40025000,
+        size: 0x1000,
+    },
+    /* FPU Interrupt */
+    MappedDevice {
+        device: Device::Fpu,
+        address: 0x40026000,
+        size: 0x1000,
+    },
+    /* GPIO */
+    MappedDevice {
+        device: Device::Gpio,
+        address: 0x50000000,
+        size: 0x1000,
+    },
+    /* Factory Information Configuration */
+    MappedDevice {
+        device: Device::Ficr,
+        address: 0x10000000,
+        size: 0x1000,
+    },
+    /* User Information Configuration */
+    MappedDevice {
+        device: Device::Uicr,
+        address: 0x10001000,
+        size: 0x1000,
+    },
+];
diff --git a/src/main.rs b/src/main.rs
index 4817e68..3d7591b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,7 @@
 #![no_main]
 #![no_std]
 
+mod devices;
 use core::{arch::global_asm, panic::PanicInfo};
 
 global_asm!(include_str!("bootstrap.s"));