DESK-XZ7-L/Peripherals/NOR
| HOME | SOMs | SBCs | ToloMEO Embedded Assistant |  GET A QUOTE
|
 ONLINE HELPDESK
|
| Roadmap | IoT Services | ML/AI services | Embedded Design Services |
| History | |||
|---|---|---|---|
| Issue Date | Notes | ||
| 2024/01/23 | DESK-XZ7-L-1.0.1 release | ||
Contents
Peripheral NOR[edit | edit source]
Device tree configuration[edit | edit source]
Here below an example of device tree for the Quad-SPI NOR flash configuration used on standard DAVE's kit for the BORA, BORA Xpress and BORA Lite:
From bora.dtsi:
...
...
&qspi {
flash0: flash@0 {
// we need to use 128Mbit (16MiB) device compatibile even if
// the real hardware has a 256Mbit (32MiB) device because of
// Zynq QSPI controller limits
compatible = "spansion,s25fl128s1", "jedec,spi-nor";
#address-cells = <1>;
#size-cells = <1>;
reg = <0>;
spi-tx-bus-width = <1>;
spi-rx-bus-width = <4>;
spi-max-frequency = <25000000>;
};
};
...
...
Accessing the peripheral[edit | edit source]
Linux messages at boot time[edit | edit source]
[ 0.509067] spi-nor spi0.0: found s25fl256s1, expected s25fl128s1 [ 0.515401] spi-nor spi0.0: s25fl256s1 (32768 Kbytes) [ 0.520482] 1 fixed-partitions partitions found on MTD device spi0.0 [ 0.526863] Creating 1 MTD partitions on "spi0.0": [ 0.531648] 0x000000000000-0x000002000000 : "boot"
Check the mtd partitions[edit | edit source]
root@boralite:~# cat /proc/mtd dev: size erasesize name mtd0: 01600000 00020000 "bootbin" mtd1: 00040000 00020000 "ubootenv" mtd2: 1be00000 00020000 "rootfs"
