docs(README): update doc structure and project status

README.md

@@ -15,7 +15,53 @@ The structured MCU DB of HPM MCUs. The home of [hpm-metapac][docs-rs].
 
 All PRs and Issues are handled in [andelf/hpm-data](https://github.com/andelf/hpm-data).
 
-## MCU Family
+`hpm-metapac` is generated from this repo. For each commit(or push) of hpm-data, it's pushed to <https://github.com/hpmicro-rs/hpm-metapac>,
+with a tag of `hpm-data-<commit-hash>`.
+
+## hpm-metapac
+
+- The `hpm-metapac` crate has a `metadata` feature, when enabled, it will provide the basic metadata of the currrent MCU
+- Patch vectored interrupt mode, add `CORE_LOCAL` for Non-External Interrupts
+- To best fit for HPM RISC-V's clustered register desigin, the following is added:
+  - All clocks, for `SYSCTL.CLOCK`, under `hpm_metapac::clocks::`
+  - All SYSCTL resources, under `hpm_metapac::resources::`
+  - All GPIOs and it's PADs, for `IOC`, under `hpm_metapac::pins::`
+  - All IOMUX settings (`FUNC_CTL`), under `hpm_metapac::iomux::`
+  - All TRGM const definitions, under `hpm_metapac::trgmmux::`
+- The version on crates.io is not updated frequently, please use the git repo directly
+
+### Usage
+
+```toml
+[dependencies]
+hpm-metapac = { version = "0.0.3", git = "https://github.com/hpmicro-rs/hpm-metapac.git", tag = "hpm-data-6740ca6fd1ed6d9bb57944b42aa299761b974713" }
+
+# If you want to use the metadata feature in build.rs
+[build-dependencies]
+hpm-metapac = { version = "0.0.3", git = "https://github.com/hpmicro-rs/hpm-metapac.git", tag = "hpm-data-6740ca6fd1ed6d9bb57944b42aa299761b974713", default-features = false, features = [
+    "metadata",
+] }
+```
+
+A simple example to configure pin PA25 for PWM1_P1:
+
+```rust
+use hpm_metapac as pac;
+use pac::{iomux, pins};
+
+pac::IOC
+    .pad(pins::PA25)
+    .func_ctl()
+    .modify(|w| w.set_alt_select(iomux::IOC_PA25_FUNC_CTL_PWM1_P_1));
+```
+
+## Support Status
+
+- All peripherals are supported
+- All MCU families are supported
+- Peripherals that have a HAL driver or raw PAC demo in [hpm-hal](https://github.com/hpmicro-rs/hpm-hal) is reviewed and tested
+
+### MCU Family
 
 (in order of release date)
 
@@ -26,24 +72,13 @@ All PRs and Issues are handled in [andelf/hpm-data](https://github.com/andelf/hp
 - HPM6800 - display, user interface
 - HPM6E00 - EtherCAT
 
-### Support status
-
 - [x] HPM6700/HPM6400
 - [x] HPM6300
 - [x] HPM6200
 - [x] HPM5300
 - [x] HPM6800
 - [x] HPM6E00
 
-## hpm-metapac
-
-- The `hpm-metapac` crate has a `metadata` feature, when enabled, it will provide the basic metadata of the currrent MCU
-- Patch vectored interrupt mode, add `CORE_LOCAL` for Non-External Interrupts
-- To best fit for HPM RISC-V's cluster register desigin, the following is added:
-  - All clocks, for `SYSCTL.CLOCK`, in `hpm_metapac::clocks::`
-  - All GPIOs and it's PADs, for `IOC`, in `hpm_metapac::pins::`
-  - All IOMUX settings (`FUNC_CTL`) in `hpm_metapac::iomux::`
-
 ## Data Source
 
 - <https://www.hpmicro.com/>