First commit

1 files changed, 101 insertions, 0 deletions

diff --git a/src/flash/issi.rs b/src/flash/issi.rs
new file mode 100644
index 0000000..1d36bb0
--- /dev/null
+++ b/src/flash/issi.rs
@@ -0,0 +1,101 @@
+//! ISSI Serial NOR Flash.
+
+use super::*;
+use crate::{ImxrtFlashAlgorithm, sequences::common as sequences};
+
+pub type Is25WP128 = Issi<{ 128 / 8 * 1024 * 1024 }, 15>;
+
+/// An ISSI serial NOR flash driver.
+pub struct Issi<const FLASH_CAPACITY_BYTES: usize, const DUMMY_CYCLES: u8>;
+
+impl<const FLASH_CAPACITY_BYTES: usize, const DUMMY_CYCLES: u8> ImxrtFlashAlgorithm
+    for Issi<FLASH_CAPACITY_BYTES, DUMMY_CYCLES>
+{
+    const FLASH_CAPACITY_BYTES: usize = FLASH_CAPACITY_BYTES;
+    const FLASH_PAGE_SIZE_BYTES: usize = 256;
+    const FLASH_SECTOR_SIZE_BYTES: usize = 4096;
+
+    fn initialize(flexspi: imxrt_drivers_flexspi::Instance) {
+        defmt::assert_eq!(
+            READ,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                READ.seq_id,
+                &[sequences::seq_fast_read_quad_io(DUMMY_CYCLES)],
+            ))
+        );
+
+        defmt::assert_eq!(
+            SET_READ_PARAMS,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                SET_READ_PARAMS.seq_id,
+                &[sequences::SEQ_SET_READ_PARAMS_VOL]
+            ))
+        );
+
+        defmt::assert_eq!(
+            WRITE_ENABLE,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                WRITE_ENABLE.seq_id,
+                &[sequences::SEQ_WRITE_ENABLE]
+            ))
+        );
+
+        defmt::assert_eq!(
+            ERASE_SECTOR,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                ERASE_SECTOR.seq_id,
+                &[sequences::SEQ_WRITE_ENABLE, sequences::SEQ_ERASE_SECTOR]
+            ))
+        );
+
+        defmt::assert_eq!(
+            READ_STATUS,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                READ_STATUS.seq_id,
+                &[sequences::SEQ_READ_STATUS]
+            ))
+        );
+
+        defmt::assert_eq!(
+            PAGE_PROGRAM,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                PAGE_PROGRAM.seq_id,
+                &[
+                    sequences::SEQ_WRITE_ENABLE,
+                    sequences::SEQ_PAGE_PROGRAM_QUAD_INPUT
+                ]
+            ))
+        );
+
+        defmt::assert_eq!(
+            CHIP_ERASE,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                CHIP_ERASE.seq_id,
+                &[sequences::SEQ_WRITE_ENABLE, sequences::SEQ_ERASE_CHIP]
+            ))
+        );
+
+        defmt::assert_eq!(
+            RESET,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                RESET.seq_id,
+                &[sequences::SEQ_RSTEN, sequences::SEQ_RST]
+            ))
+        );
+
+        let set_read_params_data = [DUMMY_CYCLES << 3];
+        crate::start_ip_cmd(flexspi, SET_READ_PARAMS, 0, &set_read_params_data);
+        crate::transmit_bytes(flexspi, &set_read_params_data);
+        crate::wait_for_ip_cmd_done(flexspi);
+        crate::clear_tx_fifo(flexspi);
+        crate::wait_for_idle(flexspi);
+    }
+}